Click the "Split Screen" button that's just above the preview screen. There's also a dropdown arrow beside that button with many presets. I know it's in the pro version but am unsure if it's in the Movie Studio versions.
Jet may be right, but I'm not sure how to do his method. As an alternative to his method, you could add the cookie cutter effect at a track level to your footage above a copy of the same video you are working on. Make sure you set the cookie cutter to rectangular and cut your screen in half, then use your pan crop windows to align the footage so that you can see your changes real time. Let us know if this helps. Cin
And in the pro forum there's tons of questions saying "I add an effect but nothing happens" because they've accidentally turned this button ON and it's set to bypass on the full screen so they see NO changes. There's also the occasional "I add an effect but it only affects half the screen" question. It's one of the most useful yet misunderstood features there.
I posted this on someone elses account (i don't have one yet), so I'm not too sure about the setting and things, so it isn't very clear, but hope you get the idea. Cin
Thanks Cin! I wasn't the original poster/requester, but I was having trouble doing this until I viewed the video you posted on UTube. That made it easy to do.
looks like it's exactly what I want .. I can see you select cookie cutter, but can't make out what you did after that ... could you put a couple of steps down as bullet points for me ?