To configure a form to save data to custom address fields:

1. Click Forms in the top navigation bar.

2. Create a new form or select an existing form.

3. Click Edit Form in the right-hand side menu.

4. Drag in a Street Address widget onto the form from the form fields palette.

5. Within the Export Key setting, manually enter the export key to link the address widget with the new custom fields. For this example, the export key would be 'sys:field_emergency_address'.  For application-scoped fields, the export key for this example would be 'sys:app_emergency_address'.