CREATE WINDOW [/GEOMETRY Sx[u] Sy[u]]
[/POSITION Offx[u] Offy[u]]
where Sx and Sy are the window size, Offx
and Offy the offset on the screen. “u” (unit) can be
“p” for pixels, “%” for percent of the screen, or “r”
for the aspect ratio in unit of the other dimension. Default
unit is pixel.