Those programmable button not assigned as appearance buttons by your administrator can be used for a range of other features. Those other features can be programmed by you or by your system administrator.
Your administrator can restrict which buttons you can change.
This guide only covers those features that you may be able to assign through the phone's own menus. Your administrator has access to a larger range of button functions.
The use of the button lamps depends on the feature assigned to the button.
Buttons programmed with a feature that is not supported by the phone, display as Invalid.
For more details, see Programmable Feature Buttons.