Viewing prior versions of a document lets you see the property values and files of the document at the time when the version was active. Prior versions can be major versions or minor versions as described in Understanding minor versions. For information about creating new versions, see Creating a new version.
To view a prior version:
In the Documents view, click the version number of the document for which you want to view its prior versions. A page listing all of the versions of the document appears.
OR
To view all of the properties of a prior version, click its version number.
Related concepts
Working with comments and discussions
About transferring properties with Office documents
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Viewing and editing document properties
Locking and unlocking documents