i play a les paul type guitar. i find i rest the part of my palm that is attahed to my thumb, call it the thumb pad, on the metal edge of the bridge. a bit above than the part the strings pass over. as i play the higher stings (towards the high e) i move my hands down the bridge covering more and more of the strings, (the onesi am not playing).
hop thishelps the explantion is a bit rushed.