Hello, I have a question.

overlay=W-w-1:H-h-1 gives me the same result as overlay=W-w-0:H-h-0.

I have to use overlay=W-w--1:H-h--1 if I want the branding to cover the whole corner.

Why does it not work with overlay=W-w-0:H-h-0? This does not make sense to me