Grid size in dyn move?

[Dutchie]

What exactly does the grid size mean in the dynamic movement trans. My guess is it changes the range of x and y, i.e. if grid size = 16x16
the range of x is -8 to 8 and the same for y. Am I correct?

If I am correct I'm still confused because changing these values seems to have no effect on my scopes.

Also what does the rectangular co-ordinates mean?

Cheers
Dutchie