When working with card history, you will notice two options to reverting a file.
The first option is to "Revert File and meta data" 
. This option allows you to take a file and the meta data (Document number, revision, submission number, dates) from the card history and place it as the current file and data on a card.
The second option is to "Revert File" 
. This option allows you to take a file from the card history and place it as the current file on a card.
For more information on Card History, see our article here.