Folder Properties -> Types

See how the individual file type categories are broken up in to each extension. The user can see how many graphic type files exist and how many of each type of graphic exist: i.e. how many .gif, .jpg etc. Right mouse button on the category will allow you to toggle a graphic representation of the contents of the category.
Double click on any extension in the tree to see a list of files matching the selected extension.
Click the right mouse button for a popup menu which has the following options;
Export all of the file details of the selected category to a CSV file (thse can be imported in to Microsoft Excel, as well as many others applications).
Add all of the files from the selected category to a zip (compressed) file.
Copy the table to the clipboard.