Pioneer DEX-P90RS - Manual (Page 23)

Setting the Menu Lock
About the Menu Lock
If you switch the Menu Lock ON, it is possible to refuse the opened remote control
operation to adjust the Audio Adjustment.
It is useful when you do not want to readjust the data by mistake.
Switching to the Menu Lock ON/OFF
It is possible to switch ON/OFF the Menu Lock.
• Press the FUNCTION button 4
on Initial Setting Screen
switches the Menu Lock
ON/OFF.
22
Setting Up the Environment for Use