Difference between Preview and Program screens

Chalklands

New Member
Hello,
I'm new to this software.
I'm testing it by recording via a video capture stick connected to my laptop from my TV.
In a nutshell, what is the difference between the Preview and the Program screen. Does the Program screen show a preview of the output recording? What does the Preview screen do?
If I click on the Preview screen a red line appears around the screen which I can resize. What exactly does this do?

Apologies if these are dumb questions!
 

R1CH

Forum Admin
Developer
You should probably not start with studio mode if you're new to the program.
 
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