Panasonic GD76 - Manual (Page 22)

Setting Ring and Key Volume
Changing either the ring volume/key volume is done in the same manner. If
you increase the ring volume above maximum it will set an escalating ring
tone. If you turn the ring volume off, the silent indicator icon ([) will be
displayed.
1 From Idle Z Q, select Personalise > Tones Z Q
2 Select Ring Volume or Key Volume Z Q
3 Use e to set the volume level Z Q
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Basic Operation