Asus AIO User Manual page 36

・Save Changes and Exit
Exit system setup after saving the changes.
F4 key can be used for this operation.
・Discard Changes and Exit
Exit system setup without saving any changes.
ESC key can be used for this operation.
・Discard Changes
Discards changes done so far to any of the setup questions.
F2 key can be used for this operation.
・Restore Defaults
Restore/Load Defaults values for all the setup options.
F3 key can be used for this operation.
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