To create a hidden album, you can create, or drag and drop an existing album into Client Albums.
Step 1: Open your Client album and select the Invite Clients button.
Step 2: Enter your email address as an invitation, click Add contact.
Step 3: Disable Proofing layout, then copy the link of that album.
Step 4: Go into your Design manager and select:
Homepage > Edit all pages > Menu.
This will bring up an Add external link button to your right.
Select the add external link option and paste the link from your album invitation into the appropriate box.
Be sure to name the link as well.
You should now have a menu link that directs to your hidden album!