Win8 how to display the file extension

The last article mentioned how win7 shows the file extension, because the needs of the majority of users, now more and more win8 system, the new computer comes with a large system Part of it is win8, then how to display the file extension in the win8 system?
Operation method:
First,
open the folder, expand the Ribbon toolbar, as shown:

2.
Click the “View” tab to tick off “file extension”.

3. After you tick off the extension, you can change the name as you like. Don't worry about the prompt after the change

The file extension can be displayed after this setting,

The effect is as shown in the picture