31 PANEL DESCRIPTION■ Assignable function keysThe following functions can be assigned to the [UP], [DOWN],[P0], [P1], [P2], [P3] and [P4] assignable function keys.Consult your Icom dealer or system operator for details con-cerning your transceivers presetting.INFORMATION:Depending on the presetting, the preset function for [P0],[P1], [P2] or [P3] is assigned to [A], [B], [C] or [D] of theoptional HM-152T, respectively. Ask your dealer for details.CH UP AND DOWN KEYS➥ Push to select an operating channel.➥ Push to select a transmit code channel after pushing [TXCode CH Select].➥ Push to select a DTMF channel after pushing [DTMF Au-todial].➥ Push to select a scan group after holding down [Scan AStart/Stop]/[Scan B Start/Stop] for 1 second.ZONE KEYPush this key, then select the desired zone using [CH Up]/[CH Down].What is “zone”?— Selected channels are assigned to azone according to how they are to be used in a group.For example, ‘Staff A’ and ‘Staff B’ are assigned into a“Business” zone, and ‘John’ and ‘Cindy’ are assigned into a“Private” zone.ZONE UP AND DOWN KEYSPush to select an operating zone.SCAN KEY➥ Push to start and cancel a scan.• When the Power ON Scan function is activated, push to pausethe scan. The paused scan resumes after the specified time pe-riod has passed.➥ Hold down this key for 1 second to display the scan list,then push [CH Up] or [CH Down] to select the desired list.