really? I thought you had to shut the game off, then start it up again, or something...
even so, its hard to keep track of it. i tried before, and i often ended up getting more experience from a battle then i expected, and lving up, and having to restart and replay the battle in an easier difficulty so i could get the max hp--- and this defeats the purpose of even having it on a higher difficulty.
maybe I'm just being a whiner.