Most file management utilities have some kind of graphic representation of the tree structure. Often this representation looks like a tree or an outline. Many times part of the screen will be dedicated to this picture of the overall structure of the current drive. Since there may be more subdirectories than can be shown on one screen, there will probably be ways to scroll among the branches of the tree. You may also have the option to look only at certain levels of the structure. This is handy when you are interested in gaining a 'big picture' of how the drive is organized