Baselines for Confluence is a Confluence app by OBSS that creates 
baselines for your documents on Confluence.

Each baseline has a date defined by the user. The baseline contains links to versions of pages and attachments on those pages that were the latest version at the selected baseline date.

The app does not keep copy of pages but rather keeps links to specific versions of those pages that are already kept by Confluence. This way the app requires almost no additional storage space.

The app also allows you to export a single page or all pages in a baselines so you can get PDF exports for older versions of your documents.