Urm,same as when you are riding except you have no inside leg

The inside rein asks for inside flexion and the outside rein keeps the horse on the track ( in place of the inside leg) and controls the outside.
I prefer to work them in hand from the shoulder first until the bend is established so that I have my hand for an inside leg aid,then I gradually move further back and can use the stick as an inside leg when I am at the Qs so its only when you are walking right out behind the horse that you completely lose the inside leg aid by which time you should have enough control with the reins.
If you are going out on long lines its advisable to have an extra person by the horses shoulder for safety for a while.
Hope that helps,I had hoped that somebody else would answer
