Dell U2713HM User Manual page 42

NOTE: Dynamic Contrast provides higher contrast if you choose Game mode and Movie mode.
Reset Display Select this option to restore default display settings.
Settings
Other Settings Select this option to adjust the settings of the OSD, such as, the languages of the OSD, the amount of time the menu remains on screen,
and so on.
Language Language option to set the OSD display to one of eight languages (English, Espanol, Francais, Deutsch, Brazilian Portuguese, Russian,
Simplified Chinese or Japanese).
Menu Transparency
Select this option to change the menu transparency by pressing
Menu Timer OSD Hold Time: Sets the length of time the OSD will remain active after the last time you pressed a button.
Use the
Menu Lock Controls user access to adjustments. When Lock is selected, no user adjustments are allowed. All buttons are locked.
NOTE:
Unlock function– Only hard unlock (Press and hold the button above power button for 10 sec)
Energy Smart When Energy Smart is switched On, the Brightness function shall be disabled.
When the Energy Smart is Off, Brightness function shall be activated.
The text and the icon of "Dynamic Contrast" shall be deactivated and grey out.
When Energy Smart is On, the dynamic dimming feature automatically reduces the screen's brightness level when the displayed
or to adjust the slider in 1 second increments, from 5 to 60 seconds.
Lock function – Either soft lock (through OSD menu) or hard lock (Press and hold the button above power button for 10 sec)
and buttons (Minimum: 0 ~ Maximum: 100).