How many tipe of scrolling are possible with Blitz?

Yes for larger bitmaps i think that drawimage rect is a good command indeed.
For a tiled screen i think that the easiest method (easiest if you aren't confused with many object...) is the origin...
In my old language (back in the amiga days)for the scrolling there's a specific command,i think it's called "scrollviewport" or something....