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.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10