You can activate the drawing tablet with the menu command 'Settings - Digitiser - On'. A button with a tick will appear in front.
'On' without a tick means that in this setting, the stylus or puck attached to the tablet functions only as a mouse. If you click on 'On', the functions of your tablet template will become active.
Hint
If the command is shown as inactive (greyed out), this means the tablet was switched off at startup and the WINTAB drivers are not loaded.