Resetting Recall Depth in Angband
Solution 1:
I took a look at the source code of Angband 3.1.0beta, and if I read it correctly, when you use a Scroll of Word Recall with a dungeon level smaller than the maximum visited dungeon level, you are asked whether or not you want to "Reset recall depth?". So, the new version of Angband should have the option to do it.
Some variants — Hengband at least — also have a Scroll of Reset Recall that does just that, reset your recall depth. I think it sets it to the current dungeon level (didn't check the source code for this one, just the list of scrolls).