Navigation:

On your left-hand side is a tabbed pane. Each tab is labeled accordingly, (e.g. Nature, Landmarks...etc). Click once on the labeled pane to position to that selection. When done, a folder or folders are displayed. In each is a "+" or a "-" sign. Click on "+" sign to expand the folder, and conversely, on "-" to collapse the folder. When expanded, items for selection are displayed.

On the right-hand side of the pane are two wee black arrows. One points to the left, the other to the right. Click it to go thru each tab in the pane.