How do I select which optional content (i.e Layers or OCGs) in PDF to render ?

Technical Support Apryse SDK
1

Q: I have a PDF with some optional content (i.e Layers or OCGs).

When I view file in Acrobat I see different image (i.e. layers) then when using PDFDraw in PDFNet. Several of the parts of the file are turned off but PDFNet is ignoring that.

How do I select which layers to render?

A: To take into account the current layer setting you need to set the current OCG Content using pdftron.PDF.PDFDraw.SetOCGContext().

For a relevant sample code, project please see PDFLayers:
http://www.pdftron.com/pdfnet/samplecode.html#PDFLayers