In this guide, we will show how to create a sub-menu on navigation menu.
At the moment, we have two folders(pages) on navigation menu.
Let's make HR_personnel the sub-folder of personnel. Go to Navigation Menu and double click personnel.
Set its Node Type property to Folder.
Double click on HR_personnel, set its Node Type property to Folder as well and then select personnel as its Top Menu Node.
As a result, we have HR_personnel as sub-folder of personnel on navigation menu.