Small amount of brake with the inner hand. This "fixes" the inner wingtip. Then vary the pitch of the outer hand for the kite to rotate around the wingtip.
The action varies depending upon the aspect of the kite and the direction of the move. You should practice each one individually.
A good drill is 180s upwards (left right left right left etc.), and 180s downwards. This is how I got the hang of it.