Sennheiser System 2015 Notice D'emploi page 28

With most menus, new settings become effective immediately without
having to be stored. An exception is the "CHAN" menu. With this menu,
new settings only become effective after they have been stored
("STORED" appears on the display, indicating that the setting has been
stored) .
Exiting the operating menu
Select the "EXIT" menu to exit the operating menu and to return to the
standard display.
When in the operating menu, briefly pressing the ON/OFF button will
cancel your entry (ESC function) and return you to the standard display
without storing the setting.
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