Types of PDF Forms There are three primary types of PDF forms, each with distinct characteristics and use cases:   1. AcroForms Traditional and most common type of PDF forms. Created using tools like Adobe Acrobat.   2. Static XFA PDF Forms ... Read More

Using the Adobe PDF Library, you can access the XML structure behind an XFA form field. XFA, or XML Forms Architecture, is a set of proprietary XML specifications for use with web forms. XFA forms are saved within a PDF document. If you want to merge... Read More

A Forms Data Format (FDF) file is a text file used by Adobe Acrobat to hold values exported from PDF forms documents. The Adobe PDF Library views an FDF file as a COS document. As such, it can be opened by the Adobe PDF Library, and can be used with... Read More

PostScript does not support translucent inks, so transparent objects cannot be rendered as such. In the Adobe PDF Library, you may specify that they are flattened, or that the page be rendered as a bitmap. Read More

PDDocInsertPages is a method that can be used to merge pages in multiple PDF documents into a single PDF. The process requires a number of steps and is memory intensive, but you can merge as many source PDF documents as your system memory will allow.... Read More

As in PostScript, in the Adobe PDF Library the matrix is the primary method used to control where PDF elements are placed on a page, and the size (scale) of those elements: a and b are the scale factors in X and Y positions of the movement in x c... Read More

The PDPageGetSize() interface was created first to return PDF page size, returning it as a simple width and depth. These interfaces were added later to provide more precise definitions of the page added to the PDF document: PDPageGetMediaBox()... Read More

The retrieved values of PDPageGetBBox are members of an ASFixedRect structure, which stores four ASFixed variables for use in defining rectangular areas: Left Top Right Bottom The variables are defined in the asexpt.h header file. These are ASFixed... Read More

A PDF document may contain thumbnail images, but they are not required. Adobe Acrobat ignores any thumbnails it finds in a PDF, and automatically generates its own temporarily when they are needed for page viewing. It does not embed its own... Read More

The PDFEdit Layer (PDE) of the Adobe Acrobat API contains classes that provide for editing in PDF documents including colorspaces, clip and page objects, fonts, form XObjects, and other objects. PDFEdit provides easy access to PDF page contents.... Read More