Green screen image overlay

[Bas68]

EDIT: after posting I found the solution myself! Draw a power window around the object and it works.

Hi All,

Question: I'm using davinci 16.
I have a green screen clip that I want to add/overlay to my base clip.

I can remove the green using the qualifier and alpha output in Resolve, works fine.

But now when I add the green screen clip to my base I want to make it smaller. However when I use transform to make the green screen clip smaller the base video is also cropped around the edges of my green screen clip...
It must have something to do with the alpha output because I can do what I want with the full clip (without green removed)..

Anybody knows how to deal with this?

Many thanks,
Bas