Windows 98

1. Click on Start
2. Point to Settings and then click on Folder Options
3. Select the View tab in the Folder Options window
4. In the Advanced Settings list, UNCHECK Hide file extensions for known file types
5. Click on OK

Windows 2000

1. Click on the Start button



2. Point to Settings and then click on Control Panel



3. Double-click on the Folder Options icon



4. Select the View tab in the Folder Options window



5. In the Advanced Settings list, UNCHECK Hide file extensions for known file types



6. Click on the OK button



7. Close the Control Panel window

Windows XP

1. Click on Start
2. Click on Control Panel (if you are using the Classic Start Menu then you must first point to Settings)
3. Double-click on the Folder Options icon in Classic View (if you are in Category View and so cannot see the icon you must first click on Switch to Classic View)
4. Select the View tab in the Folder Options window
5. In the Advanced Settings list, UNCHECK Hide extensions for known file types
6. Click on OK
7. Close the Control Panel window

Macintosh Operating Systems previous to Mac OS X 10.2 (Jaguar)

Macintosh Operating Systems previous to Mac OS X 10.2 (Jaguar) do not hide file extensions. If you have saved a document with a file extension, it should appear at the end of the filename.

Mac OS X 10.2 (Jaguar)

1. Switch to the Finder (click on your desktop or on the Finder icon in the dock to make sure the Finder is the active application).



2. From the Finder menu at the top left, choose Preferences.



3. Check Always show file extensions.

Mac OS X 10.3 (Panther)

1. Switch to the Finder (click on your desktop or on the Finder icon in the dock to make sure the Finder is the active application).



2. From the Finder menu at the top left, choose Preferences.



3. Under Advanced, check show all file extensions.