Resetting EC

[gogo]

Hi, I had been trying AETTR in the Av mode. Still learning it to be honest. After the ETTR is done and the shot is taken, my camera is set with an EC of whatever ETTR decides it to be. I don't need this EC for my subsequent shots, so need to manually dial the EC back to 0. Question is, is there a easy way to set the EC back to 0, in ML? What I would like is a button assigned, pressing which I can get all EC to 0, so that it can work not only work with ML's ETTR, but also with any manual EC I set for some shots.
thanks for the help

[gogo]

Hadn't been here for sometime.. just wanted to make sure my query is understood. I'm looking for a way to set EC back to 0 without having to dial through the mode dial.. any help appreciated.