747 fuel transfer

EDIT: Ignore this request. I found out on my own and didn't fall out of the sky ;-)If tanks 2 & 3 are less than 1 & 4 how do I transfer fuel from 1 & 4 into 2 & 3?Do I switch off 2 & 3 pumps and leave 1 & 4 on to pump fuel from tanks 1 & 4 into the manifold to fuel engines 2 & 3?TIADave