Hi! Is there a way to Maximize/Resize the "Add Motion Clip" window via Python since C4D's interface won't allow it? Thanks for your time.
strictly speaking, no, there is no sane way to do this. You could of course start digging around in the OS specific APIs or use a specific wrapper, win32gui for Windows for example, but that would obviously only work for actual window frames of the GUI framework of the OS. Cinema's internal window concept, i.e. anything that is docked, is completely off limits within Python.