See in the User Manual, the sections Maps and compas.
From left to right: Back (to navigate in maps), ; zoom + ; zoom - ; center the map (on your position, useful after a big fast zoom) ; ? to search ; Events Below: IG hour[1] ; climatic conditions (important for drilling).
The map (M) has 3 zooms. To change the view, or use the scroll mouse on map, and/or clic on a town to see its map.
Backup your files: quit game, and zip your folder save (check the date, to be sure it's the right one [2]) :p Your personal landmarks are held in a .xml file - named "landmarks_nameoftoon.xml" in the save folder.
To merge 2 files:
If you want to share landmarks between characters on same computer, then rename landmarks file to shared_landmarks.xml
shared_keys.xml and shared_interface.icfg exists aswell
In May 2019: JY 2603 patch