- In the web interface, click on Function Keys and configure the desired labels under Smart Label Keys, in the "Full Label" field:
(ignore field "Short Label", the setting is not used with the D120 and will be removed in the future versions):

- Click on SmartLabel and set Default Display Mode to "Short"(only icons), "Half"(only text) or "Full"(icons and text) for Idle screen:

- The phone will show the labels on the display next to the keys:
Short mode:

Half mode:

Full mode:
