Setting Up the Gadget’s 2D Screen Position: <xypos>

This shows how to set up a gadget’s 2D screen position in normalized co-ordinates.

     <xypos>--+- XR val -+- YR val -.

              ‘- YR val -+- XR val ‑‘-->

Note:
Normalized co-ordinates represent a proportion of the full screen size.
0.0 <= XR <= 1.0 and 0.0 <= YR <= 1.0.