Directory Map Display:  This is the Directory Map.  It's primary function is to display a directory structure which contains storage totals for each directory plus the cumulative storage total of all files nested within subdirectories below.

Use the slider control, which separates the directory tree from the file list, to arrange the display to your preferences.  

You can also adjust the column widths as desired and these settings will be retained for future displays.  Another feature is the ability to change the split between the displays from vertical to horizontal.

Hint: The right mouse button often provides you with additional information and a list of available options when pressed while hovering above any of the primary displays.  You can use the right mouse on the Tree Display to switch between a tree view of your directories and a grid view. 

Don't forget to use the mouse and the tool tip help to review the functions associated with the buttons on the toolbar.    

Hint: You may have up to 9 different Directory Map displays visible at a time.