How is it possible to fit the chroma key screen or part of it in the bottom screen? In some other programs you could pick a regular or irregular shape off the green screened clip to fit it into the background clip. Thank you.
Is it possible to have only an irregular cut out from the subject in the green screen clip ? Thanks.
Use the Mask: Simple Shape filter multiple times, and on the extra ones you can set Operation to control hows the shapes combine together (add or subtract).