but that doesn't help - just see a background is not very helpfull if you normally have the background turned off.
Just so I know for certain what you want: Do you want to be able to see how much space a 25-man raid will take up? Or, do you want something else?
If you do want to see how much space grid will take up, please make your background visible and try the FakeSize function again. If that provides what you want, I can change the FakeSize function so that it makes the background visible and red temporarialy.