map suggestion

assuming your even having a map system and its the map is zero mission style (with the little squares) could it be possible to let us mark points on the map? i sometimes find myself knowing where i want to go and then i look at my map to see if im close but then i have to search the whole map to find the room. i really wish i couldput a little marker on the rooms to show which way im going instead having to wait for the hint system to kick in and tell me where the next upgrade is.