UpDown Desk PRO Series Install Manual page 19

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Flip the desk about the NON-crank handle side (to avoid damage to the handle).
Crank the handle in an anti-clockwise direction to raise the desk and clockwise
direction to lower the desk.
NOTE: IF YOU WISH TO HAVE THE CRANK HANDLE LOCKED IN POSITION, IE CANNOT
SLIDE BACK AND FORTH, THERE IS AN OPTIONAL GRUB SCREW INCLUDED THAT ALLOWS
YOU TO LOCK THIS IN.
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