Open the "Baselines" tab in Space Administration section of your Confluence space.
You need View Baselines permission to use this tab. If you don't see the Baselines tab or Baselines tab is completeley empty, contact your Jira Administrator to get permission.
On the left column of the screen you will see the list of existing baselined created for that space.
Click on one of the baseline to see the contents on the right.
Each row shows a document (page or attachment) in the baseline with its title, type, full page location, the version of the document included in the baseline, the date of the document version and and export link.
You can click on the document title to navigate directly to the document version.