Sometimes your computer may not show the extensions of files. Here’s how to show them on various operating systems.

Windows 7 or Vista:

• Click the Start menu
• Click “Control Panel”
• Click “Appearance and Personalization”
• Click “Folder Options”
• Click the View Tab
• Under “Advanced Settings,” click the box marked “Hide extensions for known file types” to uncheck it
• Click OK.

Windows 8/8.1:

• Hold down the Windows key and press X. A menu will appear.
• Select “Control Panel”
• Double-click “Folder Options” in the window that appears
• Click the View Tab
• Under “Advanced Settings,” click the box marked ‘Hide extensions for known file types’ to uncheck it
• Click OK.

Windows 10:

• Click the Start menu
• Click “File Explorer”
• Click the View tab and then the Options button.
• The Folder Options window appears. Click the “View” tab in this window.
• Under “Advanced Settings,” click the box marked “Hide extensions for known file types” to uncheck it
• Click OK.

Apple OSX:

• Open the Finder
• In the menu bar, click Finder to open the menu, and select “Preferences”
• In the dialog box that appears, click the box marked “Show all file name extensions”
• Close the Preferences dialog.