You can create and customize the Customer Portal Menu to display when the users login into the customer portal. You can change the following settings for the Menu. To create a menu, navigate to the Design -> Menu. (Screenshot-1)
By clicking on the Menu Builder, you will navigate to the Menus page where you can see the existing created menus list.
From the ‘Menu Builder’ list, you can perform such actions as Filter the specific Page, Duplicate, or Delete, Preview, and Edit the Menu. You can also Replace the Menu by selecting the specific pages from the list of all the pages. (Screenshot-2)