In the App:
Simply click on the device name in the Devices Pane, as shown below:
The selected device will be displayed in Bold letters and the icon will appear larger on the Map and will be centered on the Map.
Tip: Use the grey UP arrow at the top of the Devices pane to Open the Device Pane if it is closed!
On the Website:
You can click on the Device name as with the App, or click directly on the device icon on the Map.
Tip! to re-centre a device you can click on a different device and click back and the device will re-centre on the Map.