Easy way to view file extensions

In the use of a computer, sometimes we need to know what type of file the file belongs to, what application to open, then you need to view the file The extension, but in most cases, there is no extension of the file name when selecting the file, as shown below:

To display the file extension, the easy way is as follows:

1. Click "Tools - Folder Options" on the window menu bar, as shown below:

2, click "View", under "Advanced Settings", find "Hide Extensions of Known File Types" Click to remove the previous tick, and then confirm, as shown below:

3, the file extension will be displayed directly behind the file, as shown below: