Preview window zoomed in, part of it cut off unless zoomed way out

The preview screen of AE is not working correctly for me. It happened when the app started glitching and my mouse cursor was in the form of a hand. I was clicking near the top and the screen slowly started to rise up. I exited and went back in, that fixed the cursor problem but now I can't properly see the preview window unless I zoom out, at that point though the screen is too small to do anything.