Changing a Map Zone with TomTom HOME Connect your navigation device directly to your computer with the USB cable and turn it on. If it asks if you want to connect to your computer, select Yes. Start TomTom HOME and click Manage my device. Select the Items on device tab. Click Maps to expand the section, and click Change map zone… Select the map zone you want from the available options and continue. The map zone will be downloaded if necessary, and the installation will start. When the installation is completed, click Done and then Eject your device to remove it safely. You can only have one map zone installed at a time, but you can switch between them whenever you need to using TomTom HOME.