terrain feature vs terrain feature specification

[floridauk]

,,,,attached is a picture of the flower bed that is a terrain feature specification.  could someone tell me how to take a terrain feature, such as a kidney shape, and how to add all the points that allow you to manipulate the feature to make that bed?

[Jo_Ann]

https://www.homedesignersoftware.com/support/article/KB-00440/creating-an-in-ground-swimming-pool.html

 

or

https://www.homedesignersoftware.com/support/article/KB-00447/adding-a-pond-and-stream-to-your-terrain.html