To set a relay (GPI) :
•Place the playhead where you want to set the relay (GPI).
•Click on «GPI» 
.
The GPI is set and is visible in the GPI window.
If you click on the GPI number, a dropdown list is shown and you can choose your GPI.
You can also define the mode. Indeed, 3 modes are available : ON/OFF/TOGGLE.
•To choose your mode click on it. A dropdown list is shown. You can modify your mode.
