The sport model of the handsets - adjust the height by rotating left for down and right for up.
Memory places are saved by pressing first the M-button and then the number you want (1, 2 or 3).
3 memory buttons
RESET: Rotate to the left (down) until the table adjusts itself down and twitches a bit lower, returning to the so-called starting height. The display also tells if you need to rotate again (reset again).
This is good general tip - Check also the trouble shooting list (in the picture).