After the welcome message, you are asked if you want to download any map corrections that are available from other TomTom users. Map Share then checks for new corrections on a weekly basis.
Tip: The size of the download for the map corrections is shown.
To change your download settings, do the following:
Tap Change Settings in the main menu
Tap Map to show the Map menu.
Tap Map Share Update.
Tap Get Corrections to choose whether you want to download corrections automatically, manually or after being asked.
Switch on WiFi Only if you only want map corrections to be downloaded when you are connected to a wireless network.
Tap Check for New Corrections to see if there are more corrections to download at any time.
Note: All the corrections that you make to your own map are shared and automatically sent to TomTom.