Place a chair in the Smith machine, under the bar.
Set the Smith machine bar at the same height that your head will be after you sit into position.
Secure the safety pins of the Smith machine so that the bar cannot drop low and hurt you.
Sit in position, plant your feet flat on the floor, and grasp the bar with a pronated (overhand) grip that is a little wider than shoulder width.
Rotate the bar to unlatch it from the rail.