Press ▼ until the double arm reads home .
Take note of the first arm position to read home.
Press ▼ until the double arm reads off position  then press ▲ once.
Take note of the last arm position to read home.
Add the two arm positions and divide by 2 to find the center.
5.000 + 13.000 = 18.000
18.000 ÷ 2 = 9.000
Multiple by -1.
9.000 x -1 = -9.000
Important: Verify that the pocket is in the up position before exiting recovery.
Leave the arm at a position reading home. Press [E] to exit.