When you navigate to a dashboard from the home page, you will be taken to the dashboard viewer page. This page is a view-only preview of the dashboard. You can switch between data sources and user groups with the top bar.
By default, you will be viewing the most recent version or current draft
Switching Viewing Version
Version Control modal for a dashboard
If you click on the "Version Control" button, a modal pops up showing you the dashboard's history. In Explo, versions follow a linear history. You always start editing off of the most recent version of the dashboard.
To view the dashboard as a previous version, simply select the "Preview" option for the version you would like to view.