Optoma CinemaX P2 SmartFIT Installation Guide - Page 15

6. Attached the SmartFIT Distance Cards to the bottom of the projector by sliding the Distance Card in from the side (left and right) until you feel the Distance Card hook the rear foot. NOTE: Instead of using the Distance Cards, the Installation Reference Guide (page 17) can be used to determine Projector distance from projection surface and offset. 7. Fold the card up or down at a 90-degree angle for the "desired projection method" (see page 4 - SmartFIT Distance Card Info). Move the projector and or entertainment center/table until the Distance Card touches the wall. The entertainment center/table and the projector must be perfectly aligned with the wall. Use the level to ensure the top and sides of the yellow frame is 100% horizontal and the side of the frame is 100% vertical BEFORE proceeding to the next step. Wall users STOP HERE - projector is ready for use.