You can create drop-down sub-tabs under any tab on your Ning Network using the Tabs & Pages feature. To make sub-tabs, go to the My Network page and click on the “Tabs & Pages” link.
Select a tab you’d like to have appear as a sub-tab. In the “Tab Information” section, check the box next to “Make this a sub-tab.” This tab will become indented, indicating it as a sub-tab. You can then drag and drop your new sub-tab to appear under any top-level tab you’d like.
You can make up to 15 subtabs for every top-level tab.
Want to add custom tabs or sub-tabs that link members to content they’ve created on the network? See: Modify the Tabs on Your Ning Network