Good point on colour setup, but take the trouble to get your monitor set as near right as you can. (It should be the first step in any set of instructions for this.) If I recall right, "Brightness" should be used to set the black level, and then "Contrast" to get a good white. (It then gets complicated, but I'm sure a lot of folks who post to galleries, here and elsewhere, aren't even getting that most basic setting right.)