I have never been able to remember what the different compositing operations in Cocoa's NSImage class do. So whenever I need to use one, I find myself having to read the documentation, which is not particularly easy to understand, because it describes the operations in words rather than graphically.
M. Uli Kusterer has had the same thought. However, I wanted something that would work at a quick glance, at a small size, and that would print easily.
So I decided to fire up OmniGraffle and create this visual quick reference:
You can download it as a PDF here.
Let me know if you find this useful or if you can think of any improvements.
