You will identify the settings for your Smartplug upon initial set up, but you can always go back and change the Smartplug name, icon, color and other settings. (Helpful if you decide to use a different appliance with that Smartplug.)
Make sure your Smartplug is plugged in, Bluetooth is on and you are connected to it. If you are not connected, the device will be shaded in the app.
Click on the Smartplug and the settings screen will open. You can adjust the settings there.
See the screenshot below.