If you want to change the order of the Items in your Project, you can do so quickly from the Content tab. This will allow you to change the Item hierarchy in your project and switch the order that your Items are listed.
This is how to go about reordering the Items in a project:
1. Go to the Content tab
This is where you can see all the Items in your project, as well as some high level information about all the Items in your project.
2. Choose to "Reorder" your Items
3. Drag and drop Items to change the order
You can drag Items vertically or horizontally to define a hierarchy.
Save your changes and your Items will now be listed in the new order.
Tip: You can set a parent for an Item when you create the Item. There's a drop down below the field where you enter the name of the Item(s) you're adding.