Another way of sending commands to a device is via the Send Command function. You can view this button once you've registered or saved the command(s) you're going to use. Navigate to Devices Commands on the navigation sidebar, and then click the Send button of the command you want to use.
Select the command relay you want to use on the drop-down menu, and then choose the device(s) and/or device group(s) you want to send the command to from the drop-down menu respectively. Click Send Command.
You should be able to see a notification saying that your command has been sent.