Dell S2421H User Manual page 33

Use the front-panel control button to lock the button(s).
1. Press and hold Button 4 for four seconds, a menu appears on the screen.
2. Select one of the following options:
Options
1
Menu Buttons lock
2
Power Button lock
3
Menu and Power Buttons
lock
4
Built-in Diagnostics
1 2 3
Dell 24/27 Monitor
Select Option:
Description
Select this option to lock OSD menu function.
Use this option to lock power button. This will
prevent the user to turn off the monitor using the
power button.
Use this option to lock OSD menu and power
button to turn off the monitor.
Use this option to run the built-in diagnostics, see
Built-in diagnostics.
4 5
Operating the monitor | 33