That is my plan but still, using a single value seems to be the smarter solution to me. Memory is not really the problem as long as I just need multible versions for the GUI but it looks like memo waste when developing a 2D game with many different tiles where you have to generate multible versions for half of the pics...

EDIT: what about a shift_x/y panel member where the user could define pixel shifts for the bitmaps of a panel on his own?
Is there a performance or technical prob implementing this?