To open the area folder, select the File tab, then from the ribbon select area.
This will open a window, where you can select an area. (If the area folder is not selected, tap on the area file on the left side of the screen, and the library will open in the main window on the right side of the screen).
Select an area by tapping on the area, a black box will appear around the area to let you know it is selected. Touch the open button in the bottom right, and the area will load to your workspace.
Please note that the area will be a dashed line. You can go to the area tab, then select from the ribbon, and use the Modify tab tools to rotate, reposition, and resize the area as needed.