ROTATING Overlays:
@overlay OVERLAYNAME rotates # anchor point x x in T
Rotating an overlay depends on it’s anchor point :
anchor point 0 0 is the bottom left of the overlay
anchor point 0.5 0.5 is the center of the overlay
anchor point 1 1 is the top right of the overlay
# is a number between 0 through 360 (like the degrees of a circle)
360 turns the overlay all the way around, which turns it back to 0
180 makes the overlay upside down