Dell E2318H - Energy Settings; Power Button LED Settings

Operating the Monitor 33
Energy
Power Button
LED
Allows you to set the power LED indicator On or Off in On Mode
to save energy.(E2318H)
Allows you to set the power LED indicator On or Off during active
to save energy.(E2318HN/E2318HX/E2318HR)
Reset Energy Select this option to restore default Energy settings.