This is driving me nuts. I am sure I managed to do this before, now I cannot figure out how to export a PDF with transparent background.   - Document Setup has "Transparent background" enabled. - I am seeing the document with the classic checked background. - During export I set "Compatibility" to PDF 1.7 (supposedly only 1.4+ support transparent backgrounds).   The files I export have a white background.   What am I doing wrong? All help appreciated.