If you don't have access to Blueprints or want to reference and troubleshoot 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
Hover over Manage (globe icon) in the left menu, and select Accounts.
Click on an account in the list.
Within the Campaigns, Ad Groups, Keywords, or Ads tabs, look for the Blueprint column with the robot icon.
Hover over the Blueprint name and select the magnifying glass.
Note: A pop-up window will appear, and you will be automatically directed to the relevant position within the Blueprint that's linked to the element you are previewing.