1) Click 'Manage Catalogs' under the 'Lists' heading of the 'Control Panel'.

2) Under 'Existing Catalogs:' select the catalog you'd like to change the description of from the drop-down menu.

3) Click the 'Edit' button.

4) Scroll down, next to 'Description' enter your catalogs description.

5) When you are finished, Scroll down and click the 'Save' button.