Shared Views and Markups in Civil 3D
Autodesk's Jeff Bartels demos how to employ Shared Views, Comments, and related Markup capabilities in Civil 3D.
From the Jeff Bartels YouTube Channel.
and the Civil Immersion blog.
Shared Views and links are free to employ with a free Autodesk account and login.
You do need to pay attention to the somewhat manageable automatic deletion of the Shared Views and Comments.
A BIM 360 account and project(s) might be better mananged solution and worth the expense in longer and larger projects.