From the time screen go to the “Set” screen by pressing the bottom-right button. Bring up the menu by clicking the Start button in the top right. You are now on the pool length adjustment screen. Begin setting this function by pressing the Start button on the top right. The pool length will flash. By pressing the bottom-right button you can choose your pool length (25/33/50 m). Confirm by clicking the Start button in the top right. To exit the settings menu press the bottom-right button until the QUIT sign is displayed. Confirm with the top-right button.