STEP 1

Locate the two locks on the right-hand side of the frame. (Location is denoted by the red arrows.)

STEP 2

Insert the key into the bottom lock and turn it to the left. Then turn the the top lock to the right.

STEP 3
Swing the door open, remove old poster. Position your new poster.

STEP 4
Close the door and secure the top by twisting the key to the left. Secure the bottom by twisting the key to the right.