Newbie question on empty map

[BH750]

Hi all. Been doing alot of reading and learning here. One thing I cant figure out or find any threads on in the blank map in survival. How do I get thing to show up or make my own landmarks on the map?

[Dr. S.]

To add to the map:

1. Get some charcoal from an old fire. 
2. Equip it. 
3. Use it via the action button (default left mouse button on a PC).

This takes 20 minutes and requires the weather to be somewhat clear. 
 

To make a mark on the map: use the spray paint.