Datalogics Knowledge Base

Why does the PDPageDrawContentsToWindow method render annotations on a PDF page, but PDPageDrawContentsToWindowEx will not?

Apr 30, 2025 APDFL, Adobe PDF Library, Optional Content, annotations, PDPageDrawContentsToWindowEx, PDPageDrawContentsToMemory, layers 0 0 0/5 (0 Vote)

Adobe PDF Library does not offer a single interface that will allow control of both Optional Content and Annotations at the same time for a PDF document. In Adobe C/C++, PDPageDrawContentsToMemory() allows selection of Annotation faces, but does not... Read More

How do I add annotations to graphs in PDF documents?

Apr 23, 2025 APDFL, Adobe PDF Library, annotation, graphs, Action Dictionaries, JavaScript, ISO 32000 Reference 0 1 3/5 (1 Vote)

If you would like to make it possible for a user to display additional information about a graph by clicking on that graph of scrolling over it, use the Additional Actions dictionary. This dictionary describes what should happen when an action occurs... Read More

How can I find all the links in a PDF document?

Apr 23, 2025 APDFL, Adobe PDF Library, links, hyperlinks, annotation, PDPageGetNumAnnots, PDAnnotGetSubtype 0 1 3/5 (1 Vote)

Hyperlinks direct a user to a different part of the same PDF document, or connect the user to an external web page. In PDF, a link is a type of annotation. So to compile a list of all of the links in a PDF document, you would search for annots of... Read More