One thing that used to work does not any more:
If you have a series of joined segments, once upon a time it was possible to select one and offset only that one. Now the whole set of segments is offset, selected or not. Makes for an embarrased trainer/BIM manager ...
😉
As a habit, AutoCAD offset is best replaced with Drag a copy/multiple copy. In ArchiCAD, offset is more intended for creating something offset to an existing element, or created a t a distance from an exisiting element or the drawn outline.
The name is the same, but it works a little different. Drag a copy.
Djordje
ArchiCAD since 4.55 ... 1995
HP Omen