In version 22 you can draw your own lines, circles and autotext, select it all and then save as a 'label' (the same as you would save as an object).
It won't be a marker but it is easy to label a door with the label tool.
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