You can manage the structure of your home and the names and icons of zones in the Device Manager of Homey. To reach this, open the Homey Desktop Application and choose Devices.
In the left pane, you can manage the structure of your home. To change the icon of a zone, simply click the current icon and select the desired one from the popup window.
To change the name, click on the name and you can immediately start editing it. Changes are automatically saved when you click somewhere else on the page.