You can change the details of any moderator. Click on Manage link available in the left sidebar. The sub-links appear as below.
Click on All Moderators option in Manage Moderators link. The list of all moderators appears.
Locate the target moderator.
In Action column, click on View button. The row expands to show the moderator details, as below.
Click on Edit button. The Moderator Information page appears where you can make the required changes, as below.
Click on Submit button to save the changes.