As you edit the Column Map, the status of each pair of columns is updated automatically. To focus on a set of mapped columns according to status, select Show from the Tools menu to open the Show Columns dialog.
The Column Map Editor lists all Destination or Source 2 columns, by default. Clear the Show All Columns check box to enable status check boxes.
Select one or more check boxes to display columns with the indicated statuses. See the description for Status in Using the Editor for a list of possible statuses and messages.