it says mask. So all I have to do is take this arrow and connect it to this. And now it's that simple. I can control just that part of the image. There you go. Piece of cake. Um, now, you know, I'm pretty anal when I'm doing, when I'm using nuke...
You can of course simply call external modules from a button, if that answers your question. That way you don't actually have to put any code (except for an import statement and a function call) in the script of the button. So you can just open your big studio wide module, and edit...