It is possible to edit the labels and functions of keys from within Activities, with the exception of the Volume, Playback, Menu Direction, Digit and Fastext keys, which are fixed. To do this, from within any screen in an Activity, select the gear (settings icon) on the top right of the screen. From the drop down menu select Edit Keys, and the keys that are available to edit will appear with a white box around them. Clicking this box will give you a choice of what to edit; Function, Label or Icon.
