Yamaha PSR-540 - Manual (Page 105)

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13
Press the [NEXT] button to display the Clear screen.
14
Press the [+/YES] button to execute the Clear operation.
To abort the Clear operation, press the [-/NO] button.
15
Press the [RECORD] button to exit from the Record mode.
For information on leaving the recording mode, see page 100.
Style Recording
Clear OK?
Completed
The Clear operation is completed...