To use your sensors widgets which you would have to add manually as shown above. A sensor bar will appear with as many sensors as on your panel. To view the temp as a number mouse over the sensor bar to see what your temperture is in a number.
To customize the sensors right click on the sensors :menuselection:`Configure "Sensors"`. The :guilabel:`Update interval(seconds)` field lets you choose how often in seconds to update the sensors. The :guilabel:`Temperature bar width` field shows how widw to make the bar for your sensors. The :guilabel:`Temperature Scale` field lets you select Celsius or Farenheit for your sensors. The checkbox :guilabel:`Warning about high temperature` puts a warning if your temperture gets too high. If you want to reset your settings press the :guilabel:`Reset` button.