In order to see the version history for a document in SharePoint, one should:
- Check the document library’s settings to ensure that versioning is enabled.
- Check the document information panel to ensure that versioning is enabled for the particular document.
- Verify that the minimum version limit has not been reached, as only the latest versions beyond the minimum limit will be retained in the library view.
- Review the version history records for the document, finding out if any of the versions have been deleted.