Joe, the tillerman holds the wheel at the bottom, and turns the wheel in the direction you want the trailer to move. Tillering is an art form.....A good driver and tillerman can put a tiller (especially THAT one being so short) can put a tiller damn near anywhere. When the guys work together enough, they can read each other's minds. "Tillering 101" Any tiller wheel will have a notch or mark painted at 12'oclock (or whatever 12oclock is with the trailer steer axle pointed dead forwards....) Pick a center point on the tractor cab, like a marker light, a radio antenna, or the bubble gum machine- whatever you want to mark the center. The idea is to keep the trailer in line with the center of the tractor as much as possible. When the tractor makes a right-hand turn, the tillerman turns his wheels LEFT. Now here is where the marked wheel comes in- you HAVE to count the number of turns by quarters.....I sound it off out loud....."One fourth....One half.....three quarters...." Because when you bring the wheel back around, you MUST return it the exact precise number of turns, or else the trailer will be crab-legging and you could wipe out parked or moving cars in the lanes next to you. Rarely will you turn the wheel more than one full turn. Only in super tight turns and then rarely more than a full 1.5 turns. As said, when backing in, tillerman holds the wheel at the bottom, and moves the wheel in the direction he wants the trailer to move in. Here's a pretty good video of some tiller action while responding.......And a secret in the fire service- The Tillerman is the sexiest job, especially in the summer in a downtown section of a big city like Winfall, when the Winfall Wimmin are outside on their lunch breaks.