Simple. Just as there are MX and MY events that move objects into either X- or Y-direction, make VX and VY events that vector-scale images in either X- or Y-direction. Possibly usages for this are for example vector scaling an image into X direction and during that, loop-scaling it into Y-direction.
Example:
I don't think that could be done any other (simple) way. Or could it?
Example:
VX,0,0,1000,1,5
L,0,10
_VY,0,0,50,1,2
_VY,0,50,100,2,1
I don't think that could be done any other (simple) way. Or could it?