Dell OptiPlex GX50 User Manual page 51

Fields to the right of the option titles contain settings or values. Those
you can change appear bright on the screen. Those you cannot change
(because they are set by the computer) appear less bright. When
<Enter> appears to the right of an option title, press <Enter> to
access a popup menu of additional options.
• Key functions — a line of boxes across the bottom of all screens that
lists keys and their functions within system setup.
• Help — press <F1> for information in the currently highlighted
option.
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