# Datalogics::PDFL Namespace > 150 classes, 0 interfaces, 116 enums. - Product: Adobe PDF Library 21 - Language: .NET Framework - Version: APDFL21.0.0PlusP1e - HTML page: https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/namespaces/Datalogics_PDFL - Version index: https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/llms.txt ## Classes - [Action](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Action.md): When a user clicks a link or bookmark in a PDF, an action occurs, moving the reader to a new location. An action can involve moving the reader to a new page in the file, for example. Also, with a PDF Viewer a PDF file can have an Action… - [GoToAction](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/GoToAction.md): A go-to action can be executed in a PDF document. A go-to action includes a hyperlink that, when clicked, takes the reader to a different place within the same document. The action is linked to a bookmark within the document. A remote… - [LaunchAction](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/LaunchAction.md): A launch action launches an application or opens or prints a document. - [RemoteGoToAction](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/RemoteGoToAction.md): A remote go-to action is an action that includes a RemoteDestination object. The action associated with this object, when selected, opens a separate PDF file, or opens a web page in a browser window. - [URIAction](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/URIAction.md): A text string, typically a hyperlink. A Uniform Resource Identifier (URI) is a text string that identifies a resource on the Internet, typically a hyperlink to a web page. A URI Action within a PDF file allows a reader to click on a… - [Annotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Annotation.md): Associates an object with its location on a page of a PDF document. An annotation associates an object such as a note, sound, or movie with a location on a page of a PDF document, or provides a way to interact with the user by means of the… - [CircleAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/CircleAnnotation.md): A circle annotation is an annotation surrounded by a curved and possibly elliptical border. The circle is inscribed within the annotation rectangle. Despite the circle name, the width and height of the annotation rectangle need not be… - [FreeTextAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/FreeTextAnnotation.md): The free text annotation allows a user to place text directly on a PDF page. An ordinary text annotation appears in a pop up window, and is attached to an icon; it represents a note added to a PDF file, and can be opened for viewing, or… - [HighlightAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/HighlightAnnotation.md): Allows the user to highlight text appearing on a PDF page. The annotated text is still readable on the PDF, but highlighted in yellow. - [InkAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/InkAnnotation.md): A type of annotation allowing a user to edit a PDF document. Ink annotations in a PDF file allow a user to work with a PDF document displayed on a screen just as if it were on paper, such as scribbling notes in the margins, or circling or… - [LineAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/LineAnnotation.md): The line annotation displays a single straight line on a PDF page. When opened it displays a pop-up window containing the text of an associated note, placed at specific x/y coordinates for starting and ending points of the line. - [LinkAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/LinkAnnotation.md): A link annotation, which features an embedded hyperlink. - [PolyLineAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PolyLineAnnotation.md): A finite number of line segments in a PDF added as an annotation. A polyline is also called a polygonal chain or piecewise linear curve. It represents a finite number of line segments where the first and last vertex are not connected. In… - [PolygonAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PolygonAnnotation.md): A polygon is a closed plane figure bounded by a finite number of line segments. In this case the polygon is created as an annotation added to a PDF file. - [Redaction](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Redaction.md): Associates an object with its location on a page of a PDF document. A redaction occludes some part of a document. - [SquareAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/SquareAnnotation.md): The square annotation allows a user to display a rectangle on a PDF page. Text associated with the Square Annotation appears in a pop-up window. The size and shape of the rectangle is defined within the Rect entry. - [TextMarkupAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/TextMarkupAnnotation.md): Annotations that appears as highlighted content when added to a PDF file. Text markup annotations appear as highlights, underlines, or strikeouts when added to a PDF document in a PDF Viewer. When the edited PDF file is opened the markups… - [UnderlineAnnotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/UnderlineAnnotation.md): A type of text markup annotation, for underlining text. Text markup annotations added to a PDF file appear as highlights, underlines, or strikeouts. The Underline Annotation appears PDF document as underlined text when the documnent is… - [AxialShadingPattern](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/AxialShadingPattern.md): A color blend that varies along an axis. An axial shading specifies a color blend that varies along a linear axis between two endpoints, and indefinitely perpendicular to that axis. - [Pattern](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Pattern.md): A pattern is used to fill an area to be painted. A tiling pattern consists of a repeating graphical figure that is replicated across an area to be filled in, or painted. A shading pattern provides smoothly varying gradients of color, to… - [Shading](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Shading.md): Represents a region shaded with color, as defined by a shading dictionary. A shading pattern defines a gradient fill in a graphic that produces a smooth transition between colors across the area covered by the graphic area. The "sh" paint… - [ShadingPattern](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ShadingPattern.md): A shading pattern consists of a smoothly varying gradient between two colors. - [ExtendedGraphicState](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ExtendedGraphicState.md): The extended graphic state, to supplement original graphic state. The Graphics State is an internal data structure in a PDF file that holds the parameters that describe graphics within that file. These parameters define how individual… - [GraphicState](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/GraphicState.md): The graphic state is an internal data structure in a PDF file. The graphics state holds the parameters that describe graphics within that file. These parameters define how individual graphics are presented on the page, including layers and… - [Bookmark](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Bookmark.md): A bookmark on a page of a PDF document. Each bookmark has a title that appears on screen, and an action that specifies what happens when a user clicks on the bookmark. The typical action for a user-created bookmark is to move to another… - [ViewDestination](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ViewDestination.md): Represents a particular view of a page in a document. A destination describes a place in the PDF document where the user will be taken in response to clicking a hyperlink. The destination defines where a bookmark or hyperlink points to.… - [CalGrayColorSpace](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/CalGrayColorSpace.md): A calibrated gray color space. A CalGray color space is a special case of a single-component CIE-based color space, known as a CIE-based A color space. This type of space is the one-dimensional (and usually achromatic) analog of CIE-based… - [CalRGBColorSpace](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/CalRGBColorSpace.md): A calibrated RGB color space. A CalRGB color space (Red, Green, Blue) is a CIE-based ABC color space with only one transformation stage instead of two. In this type of space, A, B, and C represent calibrated red, green, and blue color… - [Color](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Color.md): A color specified by values appropriate for its color space. The values that are offered range from 0 to 1.0 for red, green, and blue (RGB) or cyan, magenta, yellow, and black (CYMK). - [ColorSpace](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ColorSpace.md): Base class for all color spaces. - [DeviceNColorSpace](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/DeviceNColorSpace.md): Represents a color space with an arbitrary number of color components. DeviceN color spaces were designed to represent color spaces containing multiple color components that correspond to the colorants of some target device. They provide… - [ICCBasedColorSpace](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ICCBasedColorSpace.md): Works with the ICC color space. The International Color Consortium (ICC) developed the ICC color space in 1993 to serve as a universal standard for for printing or presenting content with digital devices, and across all operating systems… - [IndexedColorSpace](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/IndexedColorSpace.md): Indexed color spaces are used to reduce the amount of memory used for processing images. Indexed color spaces are used when a limited number of colors are needed. Commonly, an image with an indexed color space can be one third the size of… - [LabColorSpace](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/LabColorSpace.md): A Lab color space is a CIE-based ABC color space with two transformation stages. In this type of space, A, B, and C represent the L*, a*, and b* components of a CIE 1976 L*a*b* space. The range of the first (L*) component is always 0 to… - [NamedColorSpace](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/NamedColorSpace.md): Class used to define the color space in use. - [SeparationColorSpace](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/SeparationColorSpace.md): Defines the use of additional named colorants in a PDF document. Colorants in a separation color space are also sometimes referred to as spot colorants. The device displaying or printing the PDF document will supply an appropriate color… - [CancelProc](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/CancelProc.md): A callback function used to abort an operation. A CancelProc() value is typically passed to a method that uses it to determine if an asynchronous operation should be ended. At periodic intervals, the method calls the CancelProc. If the… - [Clip](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Clip.md): A clipping path is used to mark an area within a page to be highlighted or removed. The clipping path clips out part of the design. A clip can also be used with text. The clipping path defines an area within a page (text or graphic) that… - [Container](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Container.md): A container class represents a group of elements on a page in a PDF file. In the PDF file, every container has a set of Marked Content tags, starting with Begin Marked Content (BMC or BDC) and ending with End Marked Content (EMC), so each… - [Content](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Content.md): Class that represents the collection of elements on a PDF page. A content object represents a collection of elements that make up a page in a PDF file. A content object is more convenient to use than directly parsing or working with a page… - [Element](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Element.md): The base class for elements of the content of a page. An element is a building block; everything in a PDF file is an element. An element object can be associated with a large amount of unmanaged memory in APDFL and should be deleted when… - [Form](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Form.md): Represents a PDF form XObject. This is not to be confused with a PDF fillable form; a Form XObject is an object outside the page content stream. A form XObject is a way to group a number of PDF objects together, into a single container. A… - [Group](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Group.md): A set of elements to be used within a PDF document. A Group represents objects in a content object, but it resides in memory. Therefore the group has no state and is not represented in any way in a PDF content stream. When used in a Clip,… - [ClosePath](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ClosePath.md): An operator that completes a vector shape, drawing a line from the first point to the last point. A path is a series of commands that define the boundary of a vector shape. The ClosePath command draws a line from the current location back… - [CurveTo](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/CurveTo.md): The curveto operator is used to draw a Bezier curve. The curved segment is appended to a path. The curveto operator calculates the curve between two endpoints, the current (beginning) point and the final (end) point, and in relation to two… - [CurveToV](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/CurveToV.md): A curveto operator where the first control point matches the beginning. The current point is the beginning point in the curve. The name CurveToV is drawn from the "V" path construction operator. - [CurveToY](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/CurveToY.md): A curveto operator where the second control point matches the end point. Here the new current point is the end point in the curve. The name CurveToY is drawn from the "Y" path construction operator. - [LineTo](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/LineTo.md): A lineto operator, which draws a straight line. A lineto operator creates a line path element. It draws a straight line from the current position (MoveTo) to a new position-a new set of (x,y) coordinates: MoveTo{x:0 y:50} LineTo{x:100… - [MoveTo](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/MoveTo.md): An operator that creates a path by moving to a new current position. A LineTo operator creates an addition to a path element by moving to the (x,y) coordinates specified in the MoveTo statement. The MoveTo coordinates serve as the new… - [Path](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Path.md): A path in a PDF file defines shapes. Paths in PDF files are used to draw lines, define filled areas, and define boundaries for clipping graphics. A path is composed of straight and curved line segments. - [RectSegment](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/RectSegment.md): A rectangle path operator. RectSegment represents a single path, or line, within a rectangle, with coordinates xy, xy for the beginning and end of the line. - [Segment](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Segment.md): Represents a segment, or a single line, within a path. - [Collection](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Collection.md): Allows for manipulation of PDF collections, or portfolios. The class illustrates how to process a collection's schema. It also describes sorting of a portfolio. - [CollectionSchema](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/CollectionSchema.md): Provides for adding/removing/retrieving schema fields in a collection. - [CollectionSchemaField](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/CollectionSchemaField.md): Allows for the creation of collection schema field objects. Parameters that are part of a schema's field may be set. - [CollectionSortItem](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/CollectionSortItem.md): Stores data about fields that viewers use for sorting collection items. Collections are aslo known as portfolios. - [ColorConvertActions](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ColorConvertActions.md): Class that defines color conversion actions for an object described by certain attributes. - [ColorConvertParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ColorConvertParams.md): Holds parameters to be passed to a color convert method. This includes the actions to take in case of a match. Each object is compared against the selection criteria for each of the actions, in order, until a matching action is found. - [ColorValueConverter](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ColorValueConverter.md): This class contains methods used to convert sets of values from one Colorspace to another. - [DocTextFinder](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/DocTextFinder.md): A class used to extract words from a document using a regular expression. - [DocTextFinderConfig](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/DocTextFinderConfig.md): A document text finder configuration that customizes the way the extracted text is processed. In the default configuration, all options are false. Structure representing configuration options for DocTextFinder. . - [DocTextFinderMatch](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/DocTextFinderMatch.md): A phrase in the document that matched the supplied regular expression along with its associated quad bounding box(es). - [DocTextFinderQuadInfo](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/DocTextFinderQuadInfo.md): A bounding box quad of a character in a PDF file that was part of a string that matched a given regular expression. - [Document](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Document.md): The underlying PDF representation of a document. Use document objects to perform most of the functions related to pages in a PDF file, such as deleting pages, inserting blank pages, copying watermarks, creating bookmarks and thumbnails,… - [ProgressMonitor](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ProgressMonitor.md): Represents the progress of an operation. The class can display a dialog if a process will take time, and the Progress method can indicate how long the process will last. - [RolledBackDocument](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/RolledBackDocument.md): A class representing a Rolled back instance of a PDF document that was previously saved Incrementally. - [DrawParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/DrawParams.md): Settings for rendering PDF pages as images. This is used for rendering PDF pages to images, such as PNG or JPG files, to export to separate files or to send to a printer. - [EncodingInfo](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/EncodingInfo.md): Represents a font's encoding data. Encoding is the process that transforms a set of Unicode characters into a series of bytes. With PDF files, Unicode values are used to represent individual character within a font set. Unicode assigns a… - [Font](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Font.md): Represents a font. Defines the typeface, size, style (bold, italic), Unicode values, and other details. The Font class represents a font installed on the system. - [ExponentialFunction](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ExponentialFunction.md): An interpolation between two output values as input values vary across a domain. For an Exponential Function, the curve between the two values is determined by the exponent N. - [Function](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Function.md): A function is a process. A function takes input values and manipulates them to create output values. - [NamedFunction](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/NamedFunction.md): Defines a function currently in use. A Function is a process; it takes input values and manipulates them to create output values. - [PostScriptCalculatorFunction](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PostScriptCalculatorFunction.md): A function represented as a stream containing code written in a small subset of the PostScript language. - [FileAttachment](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/FileAttachment.md): A file attachment. Any file can be attached to the PDF document. The class allows to create attachment and manipulate by its content. - [FileSpecification](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/FileSpecification.md): Refers to the location of a PDF file within a file system. The PDF file system is known more commonly as the file path name. The reference can be either absolute, as in a complete path name, or relative to the current place in a directory… - [FlattenTransparencyParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/FlattenTransparencyParams.md): Represents control parameters for flattening transparencies within a PDF file. Class that represents control parameters for flattening transparencies within a PDF file. PDF files can hold objects that are stacked, and that are partially or… - [FormsExtensionVersionRec](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/FormsExtensionVersionRec.md): Structure to hold the version number retrieved by GetFormsExtensionVersion() - [Image](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Image.md): An image resource can either be an image XObject or inline image found in a page's content stream. An Image Xobject is stored separately from the graphics content stream in a PDF, and so can be used multiple times in the document, even… - [ImageCollection](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ImageCollection.md): An image collection can hold multiple images, created from an image file. The full set of images in the collection can be saved to a single image file, but only as a .tif image file. For any other file type (JPG, PNG, and so on), the… - [ImageData](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ImageData.md): A class representing the decompressed Image Data. - [ImageSaveParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ImageSaveParams.md): Class that defines parameters for saving an image to a graphics file. The parameters include the file type (such as PNG or JPG), compression, image quality, and gray scale. - [PageImageParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PageImageParams.md): Used to manage converting a PDF page to an image. The Page Image Parameters are a set of parameters used to control converting a PDF page to an image, such as a PNG, JPG, or BMP. The parameters include pixel height & width, color space,… - [Ink](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Ink.md): The ink object represents the color in the color space, CYMK or RGB. - [LanguageSetting](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/LanguageSetting.md): Specify a language, along with any metadata about that language. - [OCREngine](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/OCREngine.md): Represents an OCR Engine and its configuration. Create an OCREngine object once, and reuse it to convert multiple images to Form objects to avoid repeating the sometimes expensive initialization of the engine. The configuration of the… - [OCRParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/OCRParams.md): Parameters for configuring the OCR (Optical Character Recognition) engine. OCRParams controls settings such as the engine to use, the resolution of the input images, the language(s) to recognize, performance tuning, page segmentation mode,… - [Library](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Library.md): Used to create a new instance of a library object or change properties. A Library object can be used to create a new instance of a library or change the properties of an existing library. - [LibraryException](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/LibraryException.md) - [LogParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/LogParams.md): Defines the parameters for writing error messages to a log file. The messages include the date and time, the source of the error, and the error type: debug, info, warning, error, or fatal. This class also defines the log file name and path. - [Matrix](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Matrix.md): A transformation matrix in a PDF file is specified by six numbers. The matrix is usually in the form of an array containing the six elements [a b c d h v]. A translation is specified as [ 1 0 0 1 tx ty], where tx and ty are the distance to… - [Point](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Point.md): Represents a discrete point or space in a PDF. A Point in a PDF document is in the right plane, relative to the origin being the lower left corner of the document. - [Quad](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Quad.md): Represents a quadrilateral in a program. A quadrilateral is a polygon graphic that has four sides or edges and four corners, Bottom Left, Bottom Right, Top Left, and Top Right. - [Rect](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Rect.md): A rect holds four coordinates for a rectangle. The coordinates for a rectangle include left, top, right, bottom. Width () and height () defines the rectangle's width and height. LLx and LLy defines lower left corner, and URx and URy… - [NameTree](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/NameTree.md): The name tree is a common data structure in PDF files. A name tree is a type of dictionary that can store many more pairs of matched records than a standard object dictionary. A name tree uses keys that are character strings to map to data… - [NumberTree](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/NumberTree.md): The number tree is a common data structure in PDF files. The number tree is a type of dictionary that can store many more pairs of matched records than a standard object dictionary. A number tree uses keys that are integers to map to data… - [PDFOptimizer](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFOptimizer.md): Implementation of the PDF Optimizer function. Use the PDFOptimizer object to accumulate options for the Optimization, and to Optimize documents. - [OptionalContentConfig](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/OptionalContentConfig.md): A structure used to store data related to layers in a PDF. The Optional Content Configuration Structure is used to maintain a set of visibility states and other optional values related to layers, or Optional Content Groups, within a PDF… - [OptionalContentContext](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/OptionalContentContext.md): Defines the context for optional content in a PDF. An Optional Content Context is a status object that defines the context for optional content within a document. The context tracks the On/Off status for Optional Content Groups (layers)… - [OptionalContentGroup](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/OptionalContentGroup.md): A dictionary used to manage graphics images in a PDF. An Optional Content Group is a dictionary that represents a set of graphics images that users can turn on or off in a PDF document, making them visible or invisible. In a PDF Viewer,… - [OptionalContentMembershipDict](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/OptionalContentMembershipDict.md): Attaches content to one or more optional content groups. Form, container, and annotation objects can be associated with one or more optional content groups. By associating them with an optional content group, they become part of that… - [OptionalContentOrderArray](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/OptionalContentOrderArray.md): Array node class for items in the OptionalContentConfig Order array. Items in the Order array can be arranged into a tree structure; subarrays within the parent array form 'branches' of the tree. Each OptionalContentOrderArray may contain… - [OptionalContentOrderLeaf](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/OptionalContentOrderLeaf.md): Leaf node class for items in the OptionalContentConfig Order array. Items in the Order array can be arranged into a tree structure. Each 'leaf' on this tree would be an OptionalContentOrderLeaf that contains a reference to an… - [OptionalContentOrderNode](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/OptionalContentOrderNode.md): Base class for items in the OptionalContentConfig Order array. Items in the OptionalContentConfig's Order array are either OptionalContentOrderLeaf or OptionalContentOrderArray. This is the base class for both; you cannot instantiate an… - [Page](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Page.md): Represents a page within a PDF file. The page is the basic object used for organizing content in a PDF document. - [PageLabel](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PageLabel.md): Describes numbering labels for a range of pages. PageLabel describes how to construct a label string for a range of pages. It contains information on number style, any prefixes, and a starting position within the document. Note that a… - [PageRange](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PageRange.md): Specifies a range of pages in a document (page numbers begin with 0). - [PaperSource](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PaperSource.md): Defines a set of paper trays in a printer that can be used to select the paper source when printing. - [PrintParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PrintParams.md): Print settings, primarily used for PostScript printers or output. - [PrintUserParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PrintUserParams.md): A structure used to set parameters for print jobs. Two structures provide settings for setting parameters for print jobs, PrintUserParams and PrintParams. PrintUserParams was created first, and then PrintParams was created as an extension… - [PDFAConvertParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFAConvertParams.md): Parameters for converting a document to PDF/A compliance. These parameters control how a Document is converted to the PDF/A standard. • `RemoveAllAnnotations` if true, will remove all Annotations and Actions from the output •… - [PDFAConvertResult](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFAConvertResult.md): Contains a PDF document if the conversion is successful; returns null if the conversion fails. PDF/A is an ISO-standard version the PDF format, lighter and designed to be used with PDF files that need to be archived for long periods. For… - [PDFArray](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFArray.md): Represents an array of data elements within a PDF document. All objects in a PDF document are built from a collection of simpler objects that represent fundamental datatypes like numbers, strings and arrays. PDFObject and its subclasses… - [PDFBoolean](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFBoolean.md): Represents a boolean data element within a PDF document. All objects in a PDF document are built from a collection of simpler objects that represent fundamental datatypes like numbers, strings and arrays. PDFObject and its subclasses allow… - [PDFDict](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFDict.md): Represents an associative collection of data elements within a PDF document. All objects in a PDF document are built from a collection of simpler objects that represent fundamental datatypes like numbers, strings and arrays. PDFObject and… - [PDFInteger](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFInteger.md): Represents an integer data element within a PDF document. All objects in a PDF document are built from a collection of simpler objects that represent fundamental datatypes like numbers, strings and arrays. PDFObject and its subclasses… - [PDFName](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFName.md): Represents a name data element within a PDF document. All objects in a PDF document are built from a collection of simpler objects that represent fundamental datatypes like numbers, strings and arrays. PDFObject and its subclasses allow… - [PDFObject](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFObject.md): Represents the underlying simple data element of an object in a PDF document. All objects in a PDF document are built from a collection of simpler objects that represent fundamental datatypes like numbers, strings and arrays. PDFObject and… - [PDFReal](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFReal.md): Represents a floating point data element within a PDF document. All objects in a PDF document are built from a collection of simpler objects that represent fundamental datatypes like numbers, strings and arrays. PDFObject and its… - [PDFStream](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFStream.md): Represents a stream of data within a PDF document. All objects in a PDF document are built from a collection of simpler objects that represent fundamental datatypes like numbers, strings and arrays. PDFObject and its subclasses allow… - [PDFString](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFString.md): Represents an array of unsigned bytes within a PDF document. A PDFString is a single data element that represents an array of unsigned bytes. It may be inserted into any collection object. PDFString may be a string of human readable text,… - [PDFObjectEnumProc](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFObjectEnumProc.md): Represents callback function for Document.EnumIndirectPDFObjects & PDFObject.Enum. Enum is short for Enumerate. The class considers a list of indirect PDF objects. The callback function calls each object, and considers each object one by… - [PDFXConvertParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFXConvertParams.md): Parameters for converting a document to PDF/X compliance. These parameters control how a Document is converted to the PDF/X standard. - [PDFXConvertResult](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PDFXConvertResult.md): Contains a PDF document if the conversion is successful; returns null if the conversion fails. PDF/X is a subset of the PDF ISO standard. The purpose of PDF/X is to facilitate graphics exchange, and it therefore has a series of printing… - [PostScript](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PostScript.md): An XObject stream with the subtype PostScript. A PostScript XObject is an XObject stream with the subtype entry of PostScript. The XObject contains a fragment of code expressed in the PostScript language. PostScript External Objects are… - [PrintCancelProc](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PrintCancelProc.md): Print cancellation callback function, a class used to cancel print operations. A PrintCancelProc() is typically passed to some method that takes a long time to complete. At frequent intervals, the method calls the PrintCancelProc(). If the… - [PrintProgressProc](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/PrintProgressProc.md): Print progress callback function, a class used to notify print client of the progress during print operations. A PrintProgressProc() is typically passed to some method that takes a long time to complete. At frequent intervals, the method… - [QRColor](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/QRColor.md): Used to control how the QR color is created. - [QREncodeParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/QREncodeParams.md): Used to control how the QR code is created. - [RemoteDestination](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/RemoteDestination.md): A view of a page contained in a separate document. A RemoteDestination is not the same as a ViewDestination; the two objects are not interchangeable. - [RenderProgressProc](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/RenderProgressProc.md): Render progress callback function, a class used to notify client of the progress during rendering operations. A RenderProgressProc() is typically passed to some method that takes a long time to complete. At frequent intervals, the method… - [ReportProc](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/ReportProc.md): Represents the error reporting callback function. A ReportProc administrative command is typically passed to generate an error report. If a process is not completing properly, or taking too long to finish, this process will create an error… - [SeparationParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/SeparationParams.md): Holds parameters for making color separations. Used with PostScript. - [SeparationPlate](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/SeparationPlate.md): Represents a plate for making print separations. Used with PostScript. - [SignDoc](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/SignDoc.md): Implementation of the PDF SignDoc function. Use the SignDoc object to digitally sign a document - [StructElement](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/StructElement.md): Internal wrapper for a single node in the PDF logical structure tree. Owns a non-owning reference to its CDocument. Exposes type (/S) access, the backing dict (for arbitrary attribute reads/writes), child creation, and marked-content… - [StructTreeRoot](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/StructTreeRoot.md): Internal wrapper for the root of a PDF logical structure tree. Owns a non-owning reference to its CDocument. The underlying PDF structure tree is owned by the document; this wrapper provides C++ access to catalog-level struct tree… - [Style](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Style.md): Provides access to data about fonts, font sizes, and colors used in a word. - [StyleTransition](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/StyleTransition.md): Represents a style change in a word. A StyleTransition provides information about the character index in the word where the style changes, and the new Style. - [Text](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Text.md): A container that represents a series of text elements and characters. A Text object is container that represents both a series of TextRun elements and a series of text characters. Operations can be performed on individual TextRuns within a… - [TextRun](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/TextRun.md): Represents one or more contiguous characters in a text object. All the characters contained within a text run have the same style, color, font, and size. - [TextState](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/TextState.md): The text state includes parameters that affect text. These parameters include character and word spacing, font, font size, and horizontal scale. - [WatermarkParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/WatermarkParams.md): Watermark settings control the appearance of a watermark in a PDF. - [WatermarkTextParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/WatermarkTextParams.md): Watermark settings to control the appearance of text in a text-based watermark. - [WebConvertInfo](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/WebConvertInfo.md): Result metadata for a completed web-to-PDF conversion: page count, conversion time, document title, and resolved source URL. `Populate()` reads the plugin's last-conversion record on supported platforms and is a no-op (returning false) on… - [WebToPDFConvertParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/WebToPDFConvertParams.md): Parameters that control web/HTML-to-PDF conversion. Configure the target page geometry, viewport, image handling, and behavior on this object, then pass it to a web-to-PDF conversion call. The enum-valued settings (viewport preset, page… - [Word](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/Word.md): A word in a PDF file. Each word contains a sequence of characters in one or more styles (see Style). - [WordFinder](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/WordFinder.md): A class used to extract words from a document. - [WordFinderConfig](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/WordFinderConfig.md): A word finder configuration that customizes the way the extraction is performed. In the default configuration, all options are false. - [WordProc](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/WordProc.md): Callback function class for EnumWords. A user-supplied callback that is called once for each word found by the EnumWords method. WordFinder looks for words on a page, and keeps calling WordProc until it runs out of words in its search.… - [XPSConvertParams](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/class/XPSConvertParams.md): Class that works with XPS conversion parameters. The XML Paper Specification (XPS) is a standard document format that Microsoft created in 2006 as an alternative to the PDF format. The XPS format is intended to be a simple but secure file… ## Enums - [AcroFormExportType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/AcroFormExportType.md) - [AcroFormImportType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/AcroFormImportType.md) - [AddPageFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/AddPageFlags.md): Flags that control how annotations are handled when adding a page to a Content object. - [AFRelationship](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/AFRelationship.md): Represents the relationship between the component of the PDF document that refers to this attachment and the file denoted by the attachment - [AnnotationFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/AnnotationFlags.md): Bitfield flags that control the display and behavior of annotations. These flags are defined in the PDF specification (Table 165) and can be combined to control annotation visibility, printing, rotation, and interactivity. - [HorizontalAlignment](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/HorizontalAlignment.md) - [LineEndingStyle](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/LineEndingStyle.md) - [BlendMode](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/BlendMode.md): The blend mode used for painting objects. - [LineCap](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/LineCap.md): The line cap style specifies the shape to be used at the ends of open subpaths (and dashes, if any) when they are stroked. - [LineJoin](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/LineJoin.md): The line join style specifies the shape to be used at the corners of paths that are stroked. Join styles are significant only at points where consecutive segments of a path connect at an angle; segments that meet or intersect fortuitously… - [RenderIntent](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/RenderIntent.md) - [BookmarkFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/BookmarkFlags.md): Flags describing the visual style of a bookmark's title text. - [CollectionSplitType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/CollectionSplitType.md): Specifies the split orientation for a PDF collection (portfolio) view. Controls how the navigator and preview panes are arranged when displaying a PDF collection. - [CollectionViewType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/CollectionViewType.md): Specifies the type of navigator view used to display a PDF collection (portfolio). - [ColorConvertCSpaceType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/ColorConvertCSpaceType.md) - [ColorConvertActionType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/ColorConvertActionType.md) - [ColorConvertObjAttrs](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/ColorConvertObjAttrs.md) - [ColorProfile](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/ColorProfile.md) - [CompressImageType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/CompressImageType.md): Enumerator to allow the selection of image type to Set the values for resampling and recompression. - [CompressionCode](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/CompressionCode.md): Compression values for generating graphics files from PDF pages. A compression value must be provided for JPG or GIF images. - [CompressionType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/CompressionType.md): Enumerator used to select type of compression used when images are recompressed. For color or grayscale images: Flate, JPEG or JPEG2000 may be selected. For black and white images: Flate, JBIG2, CCITTG3, or CCITTG4 may be selected. - [CompressQuality](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/CompressQuality.md): Establish the compression quality to be used in compression schemas that allow variable quality. (JPEG, JPEG2000, JBIG2). Unset should be selected for compression schemes that are inherently lossless (Flate, CCITTG3, or CCITTG4). JBIG2 may… - [CredentialDataFmt](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/CredentialDataFmt.md): Enumeration to specify credential encoding format as either Non-PFX (PEM/DER) or PFX (PKCS#12). - [CredentialStorageFmt](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/CredentialStorageFmt.md): Enumeration to specify credential is required to be retrieved from disk (OnDisk) or is cached in memory (InMemory). - [DigestCategory](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/DigestCategory.md): Enumeration to specify cryptographic hash functions that generate variable-length message digests required for digital signature creation. - [DisplayTraits](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/DisplayTraits.md): Enumeration to specify fields to display as part of signature appearance. - [Inclusion](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/Inclusion.md): Specifies how to include a resource in a file. - [PageRotation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PageRotation.md) - [DrawFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/DrawFlags.md) - [SmoothFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/SmoothFlags.md) - [Duplex](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/Duplex.md): Duplex values. - [ElementCloneFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/ElementCloneFlags.md) - [EmbedFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/EmbedFlags.md) - [FontCreateFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/FontCreateFlags.md): Flags for creating fonts. If you want to subset a font, set both the Embedded and Subset flags - [FontFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/FontFlags.md): Bit masks describing font characteristics from the font descriptor. These flags are defined in the PDF specification and provide information about the visual style of the font. - [EncryptionType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/EncryptionType.md) - [FarEastFont](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/FarEastFont.md): CJK font related option for PostScript printing. - [FlattenerColorCompression](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/FlattenerColorCompression.md): Enumeration for setting the compression scheme for the Flattened Color images. - [FlattenerGrayCompression](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/FlattenerGrayCompression.md): Enumeration for setting the compression scheme for the Flattened Grayscale images. - [FlattenerMonoCompression](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/FlattenerMonoCompression.md): Enumeration for setting the compression scheme for the Flattened Monochrome images. - [FlattenerQualitySetting](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/FlattenerQualitySetting.md): Enumeration for setting the Quality setting for the JPEG or JPEG2000 images. - [FontRescanFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/FontRescanFlags.md): Flags controlling which font directories to rescan after initialization. These flags can be combined with a bitwise OR to rescan multiple sources. - [HighlightStyle](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/HighlightStyle.md): Specifies the visual effect used when a link annotation is activated (clicked). - [ImageType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/ImageType.md) - [InkTypes](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/InkTypes.md): Specifies the ink type used for trapping purposes. - [Language](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/Language.md): Languages which may be selected. To find if a language is available, call IsLanguageAvailable() on the OCREngine. - [MissingFontStrategy](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/MissingFontStrategy.md): The behavior to use if a suitable Font can't be found to represent the recognized Text. - [PageSegmentationMode](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PageSegmentationMode.md): Specify how the OCR engine will view the page, and how it detects text segments. - [Performance](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/Performance.md): Specify the performance of the OCR engine in an abstract way. In Tesseract, for instance, this changes the OCREngineMode. - [LibraryFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/LibraryFlags.md): Flags for initializing the library. Unless you require fine-grain control of the intialization process of the library there is no need to use LibraryFlags or you can specify the value of NoFlags. - [LogOutputFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/LogOutputFlags.md): Flags that control where DLE log output is written. Multiple flags can be combined using bitwise OR to send log output to more than one destination simultaneously. - [MirrorOptions](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/MirrorOptions.md) - [NumberStyle](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/NumberStyle.md): Specifies the numbering style for page labels in a document. - [ObjectCompressionType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/ObjectCompressionType.md): Enumerator to allow the selection of object compression type to Set the values for object compression type. - [OptimizerOption](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/OptimizerOption.md): Select the optimization option to be set or obtained. - [PDFOptimizationCompressQuality](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFOptimizationCompressQuality.md): Specifies the quality level for lossy image compression during PDF optimization. Higher quality values produce larger files with better visual fidelity. - [PDFOptimizerCompressImageType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFOptimizerCompressImageType.md): Specifies the category of images to target during PDF optimization compression. - [PDFOptimizerCompressionType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFOptimizerCompressionType.md): Specifies the compression algorithm to use when recompressing images during PDF optimization. - [PDFOptimizerObjectCompressionType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFOptimizerObjectCompressionType.md): Specifies the object-level stream compression strategy during PDF optimization. - [PDFOptimizerOption](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFOptimizerOption.md) - [OptionalContentBaseState](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/OptionalContentBaseState.md) - [OptionalContentDrawingPolicy](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/OptionalContentDrawingPolicy.md): The policy for drawing optional content within the document. - [OutputType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/OutputType.md): Specifies what kind of file to emit. - [OverprintMode](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/OverprintMode.md): A code specifying whether a color component value of 0 in a DeviceCMYK color space should erase that component or leave it unchanged when overprinting. - [PageMode](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PageMode.md): An enumerated data type used to describe the page view mode of a Document. - [PageDeleteFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PageDeleteFlags.md) - [PageInsertFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PageInsertFlags.md) - [PageMarkFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PageMarkFlags.md): Bit flags indicating which page marks are emitted for color separations. - [PageRenderWarning](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PageRenderWarning.md) - [PageSpec](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PageSpec.md): Page range specifications - [PageTilingMode](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PageTilingMode.md): PageTilingMode - [PathOperators](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PathOperators.md): Enumerated data type for path segment operators in PDEPath elements. Each value corresponds to a PDF path construction operator (moveto, lineto, curveto, etc.). - [PathPaintOpFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PathPaintOpFlags.md): Flags indicating the different paint operations for a Path. These flags control whether a path is stroked, filled, or both, and which fill rule is used. - [PDDocFormsType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDDocFormsType.md) - [PDETextFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDETextFlags.md): Flags that control how text is accessed or measured within a PDEText object. - [PDFAConvertType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFAConvertType.md): Specifies the PDF/A conformance level and color space for conversion. Each value corresponds to a specific PDF/A standard (1a, 1b, 2a, 2b, 2u, 3a, 3b, 3u, 4, 4e, 4f) combined with a target color space (RGB or CMYK). - [PDFlattenerColorCompSet](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFlattenerColorCompSet.md): Enumeration for setting the compression scheme for the Flattened Color images. - [PDFlattenerGrayscaleCompSet](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFlattenerGrayscaleCompSet.md): Enumeration for setting the compression scheme for the Flattened Grayscale images. - [PDFlattenerMonochromeCompSet](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFlattenerMonochromeCompSet.md): Enumeration for setting the compression scheme for the Flattened Monochrome images. - [PDFlattenerQualitySetting](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFlattenerQualitySetting.md): Enumeration for setting the Quality setting for the JPEG or JPEG2000 images. - [PDFObjectComparison](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFObjectComparison.md): Comparisons between two PDFObjects. Represents the result of comparing two PDFObject instances for ordering purposes. - [PDFProcessorPDFAConversionOption](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFProcessorPDFAConversionOption.md): Specifies which PDF/A standard and color space to use when converting a document to PDF/A. - [PDFProcessorPDFXConversionOption](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFProcessorPDFXConversionOption.md): Specifies which PDF/X standard to use when converting a document to PDF/X. - [PDFStreamOpenMode](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFStreamOpenMode.md) - [PDFXConvertType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFXConvertType.md): Specifies the PDF/X standard version to convert a document to. - [PermissionFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PermissionFlags.md) - [PermissionRequestOperation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PermissionRequestOperation.md) - [PrintProgressStage](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PrintProgressStage.md) - [PrintWhat](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PrintWhat.md): What portions of the document to print - [PrintWhatAnnotFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PrintWhatAnnotFlags.md): Which annotations to print - [QRErrorCorrectionLevel](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/QRErrorCorrectionLevel.md): The Error Correction Level of the QR Code - [RenderProgressStage](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/RenderProgressStage.md): Identifies the current stage of a rendering or flattening operation. These values are passed to RenderProgressProc to indicate which phase of rendering or transparency flattening is currently in progress. - [ReportType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/ReportType.md): Type codes used for error reporting. - [ResourceType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/ResourceType.md) - [SaveFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/SaveFlags.md) - [SchemaFieldSubtype](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/SchemaFieldSubtype.md): The data type of a collection schema field. - [SeparationFontOptions](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/SeparationFontOptions.md) - [SeparationPreviewOptions](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/SeparationPreviewOptions.md): Specifies how a colorant is handled during a separation preview. - [SignatureFieldID](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/SignatureFieldID.md): Digital signature field options - [SignatureType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/SignatureType.md): Enumeration to specify fields to display as part of signature appearance. - [TempStoreType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/TempStoreType.md): Enumeration for selecting the temporary storage type used by the library. Controls whether temporary files are stored on disk or in memory. - [TextFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/TextFlags.md): Flags that control how text operations address text within a Text object. - [TextRenderMode](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/TextRenderMode.md): Text rendering mode determines whether text shown will have glyph outlines stroked, filled, used as a clipping path boundary, or feature some combination of those three values. Text may also be hidden (invisible). Fill sets the color… - [TIFFByteOrder](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/TIFFByteOrder.md): TIFF Byte Order values describing the byte order used within a file. - [VerticalAlignment](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/VerticalAlignment.md): Specification of vertical alignment options. - [VisibilityPolicy](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/VisibilityPolicy.md) - [WatermarkDrawOption](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/WatermarkDrawOption.md): Specifies how a watermark should be drawn in a PDF document. Controls whether the watermark is rendered as an annotation or as a form XObject within the page content stream. The "Try" variants attempt the specified method but may fall back… - [WebDownsamplingDPI](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/WebDownsamplingDPI.md) - [WebImageCompression](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/WebImageCompression.md) - [WebPageOrientation](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/WebPageOrientation.md) - [WebPageSize](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/WebPageSize.md) - [WebViewportPreset](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/WebViewportPreset.md) - [WordFinderVersion](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/WordFinderVersion.md): This refers to versions of the WordFinder algorithm. WordFinder extracts words from a PDF file and enumerates the words on a single page or on all of the pages in the document. - [WordAttributeFlags](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/WordAttributeFlags.md): Flags returned by Word.GetAttributes. - [WritingMode](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/WritingMode.md): The direction of writing - [XFAFormExportType](https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/XFAFormExportType.md)