A blueprint in Confluence is a collection of page templates with more functionality to help you create and organize your content.
Click on the three dots next to “Create” in the menu.
You’ll see all the available blueprints and can choose one.
Please watch our Video #101 about blueprints. It’s part of the Video Tutorial Series “Learn Atlassian Confluence”. You can also read more about this subject on this page of Atlassian’s original documentation.