One touch white balance
i have the e-500 and can only register one at a time. once you set the white balance using the one touch button, it stays that way until you one touch again or custom reset. however it may be possible to save to 'my mode' 1 or 2 ... or even 'custom reset' 1 or 2. according to the manual on page 119, it saves your wb setting and most of the other changes you have made.
reset camera... soft reset. Mode Dial to P, press Menu, right arrow (AF button), to card setup, down to custom reset, right to custom reset, OK, up to YES, the OK