Civil 3D 2018 Section View Buffers
Jeff Bartels of Autodesk explains new 2018 mechanics of Section View Buffer components of Section View Styles
and the new capability to add (insert) new Section Views in a Section Group.
From the Jeff Bartels YouTube Channel.
and the Civil Imersion blog.
Note the automatic no plot nature of the new Section View Buffer component.
This is pretty easy to miss. It does not show in the Section View Style in any form.