Someone sent me a PDF. Here's what it looks like in Preview. I can see the pages in the thumbnails, but in the main window they are black. Any idea what's causing this and how to fix it.
When the program first opens the file, I see the pages for a fraction of a second before it blacks them out.
I tried calibrating my displays, as suggested in a comment, but the pages are still black. I have two monitors - the MacBook Pro's screen and an external display.