Hello, I'm not sure if a regular window can do that, but you can do it with a custom window. If you don't know how to make a custom window, type custom Windows in the knowledge Center, and you'll find explanations how to do it
One solution is to use Solid Element Operations (SEO). Create a Slab that will cut the desired hole in the Wall, use SEO to make the cut (Subtraction), then place that Slab on a hidden layer. Then place a small Wall inside the cut hole to host a Window. The SEO will not show in 2D, so Lines and Fills will have to be added to the Plan.
You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.
You can always try a polygonal wall.
Place and empty opening or window and then you can rotate it.
Barry.
One of the forum moderators. Versions 6.5 to 27 i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10 Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11