When you restrict access to the Menu, it is “locked”, preventing access to settings. A password or a file on a USB flash drive is required to “unlock” the Menu temporarily. To restrict access to the Menu, go to Menu > Toolbox > User Settings > Restrictions.

Restrict Access to Menu Settings
You can choose the method you want to use to lock and unlock the Menu: create a password, or save a system override code onto a USB flash drive. You can also keep the menu unlocked. Select the Restriction Type tab.
Password: A password is required to lock or unlock the menu.
USB: A file on a USB flash drive is required to lock or unlock the menu. If you didn’t create a USB file previously, you will be prompted to create one when you select USB.
Off: The menu is unlocked. No password or USB file is required even if you previously created a password or file.
Create USB Lock/Unlock
Use this procedure to create a file on a USB flash drive to lock or unlock the menu. You may want to create an unlock file even if you use a password to lock the menu in case you forget or lose the password.
Go to Menu > Toolbox > User Settings > Restrictions.
Select the Create USB Lock/Unlock Create button. You will be prompted to insert a USB flash drive.
Insert a USB flash drive in the device and select OK.
When “Unlock key successfully created” appears, the unlock file is complete. Select Finished and remove the USB drive.
Label the USB drive so you will remember that it contains the unlock file.
Any time you want to modify settings when the menu is locked, insert this USB drive into your device and modify the settings. When you finish, remove the USB drive.
Create or Change Password
Use this procedure to create or change a password to lock or unlock the menu.
Go to Menu > Toolbox > User Settings > Restrictions.
Select the Create or Change Password Change button. A keyboard will open.
Enter the password you want to use and select Change. If you previously created a password, edit the password and select Change.
Select Finished. When Menu is selected, a keyboard with a Password prompt will open. Enter the password and select Done or insert the USB flash drive with the unlock file to unlock the menu.
Tip: Try to make all your changes in the settings at the same time. When you exit the Toolbox, you will need to enter your password again to enable the menu even if you don’t close the application.
Menu Button Restrictions
You may want to turn off access to the Menu button, Quick Menu, and Multi-bar so that the user does not accidentally select or get distracted by them. Turn the Menu Button setting on or off to allow or restrict access to the Menu buttons.
Go to Menu > Toolbox > User Settings > Restrictions.
Select the Button Settings tab.
Toggle ON the Menu Button setting to allow access or off to restrict access.
Select Finished.
When the setting is turned on:
The Menu button is available in the top right corner of the screen.
The Quick Menu and multi-bar are available.
When the setting is turned off:
The Menu buttons are grayed out.
The Quick Menu and multi-bar are not available.
Important: With the setting turned off, you will need to use the Home button on the device (the square button at the bottom edge of the screen) to access the Quick Menu.