How do I make it so that a npc "marks" a place on my map. like the npc says " Hear I'll mark it on your map" and then a map marker apears on your map.

--Thanks!
-MNPred

Place the map marker at the location set to initially disabled, then call enable when you want to see it. Make sure Visible is checked on the marker data tab. Can travel to should only be checked if you want the player to be able to fast travel there before he actually discovers the location by walking there.

Oh...Ok thanks!

Or if you want the player to be able to stumble across it on there own by going there, as well as having it added through dialogue, have it enabled with visible unchecked, and call showmap on it in the dialogue result script.