Is it possible to go through all Elements in the PDF and change the background colour to transparent on every element (rectangle, shapes,…) where the background colour is white?
I add two files, in the second file I changed the Background colour of some elements to transparent in in the upper part of the document. That is what I would like to do programmatically.
We are afraid this might not be possible with Aspose.PDF for .NET API at the moment. However, we have logged a ticket with ID PDFNET-47230 in our issue management system for further investigation and resolution. We will let you know once any update will be available in this regard.