I downloaded some fillable PDFs from the Internet. Typed in data, hit “save”, and the PDF suddenly has a black background except for a little slice of each page, which looks normally.
Switched to another tab, and that PDF has the same glitch.
Closing and re-opening the PDF doesn’t help. Out of desperation I rebooted and that seems to have sorted it out - but when I save again it’s back to the black background.
If I go to “Print” the PDF looks correct in the previewer window.
Any ideas? Or should I just be downloading another PDF tool and avoiding Preview? If so, any suggestions?