Isn't the idea of having a virtual frame size so you can have a large scrolling area without a large frame.

The Help file says this "Virtual Width: Very useful for huge scrolling games: defines the virtual width of the frame. A large virtual width allows you to scroll on a large surface, larger than the frame itself."

Again I don't usually use this so I'm not sure.

Yes MikeR,

but the use -1 in virtual frame allow you to use a small background a little bigger of the window and frame and repeating during the scrolling proccess.

saving ram

Sorry FVivolo

I was refering to UrbanMonk's post about making the frame and virtual frame size the same. I see the -1 makes it an infinite size but you still fall through the platform unless you uncheck 'Handle background collisions...' in the Frame Properties

yes MikeR,

That correct!!!