With the addition of Captaincy, the markings on the map table became permanent (saved across sessions).
This is a great feature and I don't want it removed, but the most common use-case for drawing on the map is to mark voyages, which do not persist.
My suggestion is to enhance the map table by adding the ability to draw X symbols too which, unlike the current Os, are removed when scuttling or leaving the game.
The right mouse button (or secondary trigger) currently has no other role when interacting with the map and seems perfect for the job.
The X is traditionally used to mark treasure on maps anyway, and the O could be used to mark other points of interests.
