Show or hide file name extensions

Window 7

To show or hide file name extensions

1. Open Folder Options by clicking the Start button , clicking Control Panel, clicking Appearance and Personalization, and then clicking Folder Options.
2. Click the View tab, and then, under Advanced settings, do one of the following:
• To show file name extensions, clear the Hide extensions for known file types check box, and then click OK.
• To hide file name extensions, select the Hide extensions for known file types check box, and then click OK.