Not that I am aware of.
This is an anchor point for an object instance and can be controlled when placing the object but not through the script.
You do have the global variables of "WIDO_SILL_HEIGHT" and "WIDO_HEAD_HEIGHT" that might give you the control you want.
Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11