AW: “ALT” is the abbreviation for “Alternative” (UK/EN) and refers to a configurable function key for which a specific function can be assigned directly via the setup menu (see device operating instructions “Miscellaneous settings” on page 42). The device has an ALT keypad in the on-screen menu. Direct function assignments are possible via a long and a short ALT keystroke: Camera / FM / Setup / iPod / USB / BT / DAB+ / Mute / Voice / Apple Carplay / Android Auto / BT Music / AV-IN / EQ / DISP / HDMI / Media SD.