I would have thought this was an easy one.
I have compromised, and inserted an ADD2 command to move the head away from the section line end. Not my preference, as this means the marker requires even more space on the sheet, but I can’t figure out how the Built-In Section Marker achieves this.
AC20 6005 AUS Full & AC 21 3009 NZE Full | Win 10 Pro 64 | Intel i7-7700HQ 2.80GHz | 16 Gb RAM
NVIDIA GeForce GTX 1060 8Mb