Lexus LS 500h 2022 Owner's Manual, Quick Manual page 24

Memory recall function (driver's side only)
Each electronic key (including a card key) can be registered to recall your preferred driving
position.
■
Registering procedure
Record your driving position to button "1", "2" or "3" before performing the following:
Carry only the key you want to register, and then close the driver's door.
If 2 or more keys are in the vehicle, the driving position cannot be recorded properly.
1
Turn the power switch to ON mode.
2
Check that the shift position is in P.
3
Recall the driving position that you want to record.
23
4
While pressing the recalled button,
press and hold the door lock switch
(either lock or unlock) until the buzzer
sounds.
If the button could not be registered,
the buzzer sounds continuously for
approximately 3 seconds.