This sets all known landmarks in Point Lookout you haven't already visited to just visible. This is what I wish tmm did. I much prefer to use the ability to fast travel to a location as a way to know where I've been. This makes it easier to find places than use "tmm 1" to hone in on a location to put a beacon on (but not before loading to undo the tmm thing). I skipped all disabled map markers using the built-in naming convention.