To add or edit an alternate thoroughfare for an existing service address thoroughfare:
Click on the thoroughfare in the left pane. This displays the alternate thoroughfares for the selected thoroughfare in the right pane.
To add a new thoroughfare, click on any row in the right pane and select New.
To edit an existing thoroughfare, click on the thoroughfare and select Edit. This displays the Add or Edit Thoroughfare Alternate form.

The Add Thoroughfare Alternate form provides the following input fields:
Thoroughfare
Thoroughfare selected in the left pane, followed by the thoroughfare's Description (in parentheses).
Alternate
Enter the alternate spelling you want to add for the selected thoroughfare. A maximum of 10 characters is allowed.
To delete an existing thoroughfare, follow the steps above for selecting the thoroughfare and alternate thoroughfare, then right-click and select Delete.