I'd like to report a problem with Camtasia Studio. If you enter fullscreen preview/edit mode (fullscreen button next to all of the other tools like crop, the dimensions, etc) with certain tools on, ESC key will not close it/bring it back to Camtasia Studio. You'll be stuck in full screen mode and you have to kill Camtasia in Task Manager, losing some work. I don't know the exact causes of this problem but edit and do a lot of stuff in fullscreen and you'll eventually come across this. Please fix it!