Preview app problem in Big Sur
Since upgrading to Big Sur, when I open pdfs in Preview in full screen, there's a block at the bottom with rewind, play, and fast forward arrows. I'm guessing it's interpreting any pdf at full screen as a slide show? If I click the x to close the block, it throws the pdfs out of full screen. Besides taking up a piece of screen real estate I could use, it also seems to randomly flip from one page or one document to another while I'm working. What is this, and is there a way to turn it off?
MacBook Pro 16″, macOS 11.0