Back in 2016 I granted an API wish during Revit Technology Conference to create lines to visualize the planes of the Plan View Range. Now that tool has been added to the Boost Your BIM Terrific Tool set!
Download the source code or installer – https://bitbucket.org/BoostYourBIM/boostyourbimterrifictools/src/master/
Support Boost Your BIM so we can make more great free tools – https://patreon.com/boostyourbim
Learn the Revit API so you can make your own great tools – https://boostyourbim.wordpress.com/learn/