On the Canvas it is possible to set a pin code so that end users cannot change any settings in the setting menu (if they don't know the pin code). The pin code is by default "0000" this can be changed in the settings menu. Click here for the guide on how to do this.
To activate this pin code you need to turn this option on in the dealer menu. Please note that only dealers are allowed to access this menu and they should have the code for this.
Go to the dealer menu and select the "Display Settings".
In the display settings, go to the last option "Settings Menu pin code" and turn this on. The screen will now ask for a a pin code when you try to open the settings menu.