One touch white balance

Question

thanks for answering my question about one touch wb. Just want to make sure I understand completely....so once I have photogra[phed the white/gray card, the WB is registered. Does the one touch wb only register ONE WB at a time? If i enter a new one touch wb does it just erase the previous one? You mentioned that to erase the one touch wb you can "reset the camera"...What does that mean and how do you do this? Many thanks for all your help!