Is there any support for layers in the existing iText library ?
You are talking about Acroat 6 Layers (aka Optional Content Groups), yes?
I need some adding-removing and showing-hiding of the layers of an existing document.
You certainly won't get removing from iText - as that involves content manipulation which it doesn't address. In fact, Adobe's PDFLibrary is the only "public" library I know of with that functionality.
Showing and hiding can easily be done using the low level PDF objects to change values in the OCG Property dictionaries.
Leonard
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