Aha, so I was
I looked for an option like that, but I kept missing it because I was only hitting the Options button after a picture was already selected, and not when you're on the main browsing screen.
Thanks very much!
Is there a way to prevent the device from listing in the Pictures browser every image it finds in memory? I have a bunch of thumbnail images of book covers that it appears Calibre exports along with the book. They're stored in a different folder than the images I'd actually want to look at, but they show up in the browser.
Or, do I even need the thumbnails for anything, and is there a Calibre option that disables the thumbnail export?