Yes once the tree is formed, you can double click on the file or right click on the file and select “Preview” option. This would display preview of the file.
Note: If preview is not available it doesn't mean that the file is not recoverable. There are many reasons why a file will not be shown in preview but it is still recoverable. If you need to recover a file and it fails to show the preview, you should still proceed to recover the file.