Sharp Actius PC-MP30 Operation Manual page 36

Remote Control Operation
You can slide the button up and down and also press it. Each operation gives different
results according to the applications. (Refer to the next section.)
The hold switch enables you to lock any operation on the remote control and prevent
errors.
1
Hold Switch
1-12
Slide it up.
Press it.
Slide it down.
Slide it up.
Press it.
Slide it down.