A quick search didn't help directly, but I will use the Festool basic setup video with some additional instructions.
Using this video:
Go to 2:10
He attached the wings
(I will assume you have leveled them)
Cut a piece of wood to a known length while clamped to the machine (you will do this once for the left and the right)
At 2:28 you can see 3 out of 4 socket cap screws on the underside of the wing near the saw base. These will be loosened.
With the wings loosened they will slide left to right.
Flip down the stop on the loose wing and secure it at the known length you have cut.
Slide the entire wing until the stop contacts the precut piece.
Tighten 4 socket cap screws
Your saw is now calibrated.
Let me know if any of this needs clarification.
Ken
