If you don't have access to Blueprints or simply want a quick preview of your Blueprint from within Manage, use Blueprint Previewer. It allows you to visualize the structure of the Blueprint and view associated tags.
Previewing a Blueprint in Manage
Go to Manage in the top menu.
Click on an account in the list.
Within the Campaigns, Ad Groups, Keywords, or Ads tabs, look for the robot icon next to any Blueprint-linked element (campaign, creative, etc.).
Hover over the robot icon and select the magnifying glass.
Click Preview Blueprint.
Note: A pop-up window will appear. You will be automatically directed to the relevant position within the Blueprint that's linked to the element you are previewing.