However, in CC 2017 there is only
Liquid Layout, so how can you remove or modify horizontal blue lines in a document?
When I search and toggle the 'Extras' panel they're still present in the document:
When I reference Shortcut to hide all guides and stuff (inDesign) that only allow for preview when using w and doesn't help me understand where these line are located and in what panel.
How can you modify (move, create or delete) an Indesign's horizontal blue lines on a pre-existing document not a new document setup?