@ Keyboard KeysUsed to play notes or mélodies when thé mode selector. is in théPLAY position or store them in thé memory when thé modeselector is in thé REC position. Also thèse keys are used asbasic calculation keys when thé mode selector is in thé CALposition.© Vibrato SwitchTo give warmth and strong expression to thé sound, set thisswitch. It allowsfull and effective réverbération.(§) One Key Play Key• Each time this key is pressed thé notes stored in thé memorywill corne out in thé séquence in which they were stored inthé memory.• When thé mode selector is in thé CAL position thé key willbe thé memory plus (M+) key and thé value indicated in thédisplay will be stored in thé memory.@ "P" SwitchPress this switch to operate after replacing battery.

Casio VL-80 Operation Manual