No prob. Sometimes, you feel that you've completely explored a level, and you're still looking for a way down to the next level. I remember having to use the main map to find a way down in some dungeons. I would look at the map for one specific area that had very small blue pixels on it, which were almost undetectable. It's easy to miss the way down while being distracted by hordes of monsters, and some exits are mostly visually blocked by walls, etc...
Good luck!
