I have a question about these displays and mirroring/spanning:
If, say, one was using a 12" PowerBook (a square-ish 1024x768) with a new 20" which is more of a widescreen orientation, and you were were doing the mirroring thing, how does that work exactly?
Does the square-ish image from the 12" PowerBook simply scale-up proportionately to fill the 20" and there is black "letterboxing" on the sides where the 20" is much wider than the PowerBook...OR, does the entire screen of the 12" fill up the 20", with the pixels horizontally "stretched" to do fill the entire screen?
Does my question make sense? Is it clear?
Secondly, about spanning:
Each device runs at it's own, native resolution, right? In my case, a 15" PowerBook and 20" Cinema Display: the PowerBook would be at 1280x854 and the 20" at 1680x1050, right? They don't try to "match" or anything goofy, do they?