|Babs, You would press the Menu button which is the left button on the front of your Monitor then use either the - or + button to navigate to Brightness then do this:|
4.Press the Select button to select the highlighted item.
5.When a menu item is selected and its corresponding screen appears, use the + or – button to adjust the scale of the item.
6.Select Save and Return to save the adjustment, or Cancel or Exit if you do not want to save the adjustment.
7.Press the Menu button to exit the OSD.
NOTE: When a menu is displayed, if the buttons remain untouched for 30 seconds, adjustments and settings are saved and the menu closes automatically.