[iblong]

Can you change thumbnail size in, such as library movie view, so that more show up in the screen?

[Ned Scott]

Only if the skin you are using supports such a feature/view, or you learn how to modify the existing skin. Find a skin you like, then check out the skin sub-forums for that skin and see if anyone has advice on how to make the mod. Some people might even be willing to make a modded file for you, or at least point you to the file you need to edit.