Versioning is very important for documents, it provides a way to keep track of the changes and who made to those changes. Each time you save the document, it saved with a new version, versions can be minor or major.
Follow the below steps to enable versioning in document library
- Go to SharePoint Document library settings
- Click on Versioning Settings
- You can see the different option to enable versioning.
If you have selected the major versions then every time you do any modification in the document, it will be saved as major version, and if you selected the option showing major and minor version then it will save draft documents as minor version. You can also enable content approval, which will assign a task to someone to review the document and only published (or approved) documents will be visible to end users.
Restore an older version
You can restore an old version if required, the steps are very simple. Click on the document version history, it will list all the versioning detail containing major and minor versions. Click on the arrow to which will show the option to restore selected version. The version will be saved as a new version of the document.
Follow to similar steps to disable versioning for a document library.