books

Can any of you get this to work? I have a PDF that is writable. I "add bookmark" and it shows up just fine. I save the file. But when I close and reopen the file, the bookmark is gone. Is there some trick to it maybe? This is true for PDFs in the cloud (Books) as well as those saved...

A quick background. I am a retired software engineer/architect with 40 years experience in IT. I've worked on many OS, including MacOS9 and early MacOSX (up to Lion) on my old Motorola iBook(which is still in use as an iTunes player for my HiFi) but mostly I've been using Linux for the last...