Extensions Display:  The purpose of the display is to provide a alternative view of the files on your computer by grouping them using DOS file name extensions.  The registered file type for each file extension is also displayed. 

All unique file extension names are listed in a table on the left side of the display.  All files which share the same file extension for the currently highlighted file type are listed in the table on the right.

Don't forget to use the mouse and the tool tip help to review the functions associated with the buttons on the toolbar. The toolbar changes depending upon what the currently selected window contains.

Hint: You may have up to 9 different Extension Displays visible at a time.