Apple Mac How to view file extensions?

Apple Mac How to view the file extension? Apple Mac display file suffix name How to set? Apple Mac OS X does not display the file suffix by default, we can show the file extension by using Finder preferences, the following small series gives you how to set the Mac display file suffix name of the Operation tutorial.

First, click the Finder icon at the top of the Apple Mac desktop and click Select Preferences from the menu.

Second, in the Finder Preferences dialog box, in the Advanced Options screen, click the check "Show all file extensions", close the Settings screen, open the Finder can see the file extension!