@RunAmok ~ If you're using a Mac you can hit command and return at the same time and the Create A Pattern window will not be full screen. It will change it to a Window Mode Screen (it'll be smaller) If your on a PC there may be a keyboard shortcut also to do this, unfortunately I'm not sure what it would be since I don't have CAP on my PC. This is just a guess, maybe it could be the windows key plus return key.
Another way to resize the screen - if you are able to get to the bottom left corner of CAP there is a little button with 3 dots in it, click that then options and you can choose another screen size.