Hello @SBoyle ,
Welcome to Q&A Forum!
Please follow the steps:
1.Go to the List Settings page as a site admin
2.Click Versioning settings >> Enable "Create a version each time you edit an item in this list" option >> Enter number in the "Keep the following number of versions" textbox >> OK
3.Go back the SharePoint list page, select an item and click Version history
4.You will see detailed data on the Version History of this item
More information about Versioning, please see the "How versioning works in lists and libraries" article.
Thanks,
Echo Du
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