Hello Guest, The pole positions these days on Bridge pick ups are traditionally level no raising, however, poles can be moved where you like, years ago the "B" string was always weak and the pole under that string was always raised, there is no reason whatever that you can't experiment with pole positions you may well come up with a sound that you really like...dont forget to try all other switch position that the bridge pup is involved, as you may like one position but hate 3 more it develops. Another tip before moving poles mark where they are at present with whiteout or the like,as you may want to return to the original set up.
Regards Fenderphil