Similar to how Tools -> Quest Reports -> _??_ gives a list of any sort of thing, perhaps it would be useful if there was a list of which level numbers are assigned to which Dmaps.

L# -- Dmap
1 - 6
1 - 7
1 - 8
1 - 9
2 - 13
2 - 14
2 - 17
23 - 14
23 - 15
23 - 82

Or,

1 - 6, 7, 8, 9
2 - 13, 14, 17
13 - 14, 15, 82


This is very useful when working with level-specific keys, and maps and compasses, and even those boss-room type events, despite the ability to use screen state carryovers, which only work on Interior screens effectively, so it seems.