App Folders are a hierarchical structure, meaning that each Folder can have child folders. A child folder is usually used for a sub-topic under a broader topic.
You can add a child folder while writing a Notice or from the Folders screen. Just select a parent folder when adding a new folder, and your new folder will become a child folder.
Creating Folders
Mouse-over 'Notices' on the left side menu, and select App folders.
In the Name field, type the name of your new folder.
If you want to house this folder inside another, you can select a parent folder using the Parent dropdown. If this is a top-level folder, skip this section.
Click Add New Folder button.
That's it! It's that easy.
Please note: After creating the folders, you will want to populate the app with a notice, as only folders with content published to them will appear in the app.
A good place to start is to post a notice to each folder you want to be displayed. It can be a short brief description of each folder, this, in turn, will help you understand how the app works. Practice makes perfect.