Change room size and color depht?

[Nato]

Since I can do that? sorry the short question I'm from Spain and it costs to me to write in English, when I create a room the "relative" size are 320x200 8-bit, but my game have a size of 640,200 32-bits.

[Pumaman]

When you import a background image, it should change to 32-bits.
The "relative" size is always in 320x200 units, so a 640x400 room would have a "relative" size of 320x200.