Translations - FAQ
FAQ - Technique/20/en
De MappingDoc
If the XPS file you want to convert includes images with transparency and you choose PDF/A-1b (default), the transparency will disappear, which can make the PDF very different from the XPS. Recently added JPEG2000 compression which applies to large size images is also disabled in PDF/A-1b, which can increase the size of the PDF file created.