How can I crop a video in Potplayer to a specific screen area (as in cropping a pic to the desired-sized square/rectangle area), so that I can then zoom or enlarge my selection to full window size (not necessarily fullscreen, though that would be also useful.) Thanks for any help!
Are you wanting to know about presentation, or how to author the presentation? Is this action during playback, within the media player? This is a REALLY confusing question!
Take a screen shot, save it to your clipboard. Press the Windows key and and 'r' key. Type MSPAINT. Then on your keyboard press the keys <CNTRL>V. Now take that image and crop it and zoom it and do what ever.