For the long time users of Land Desktop and Civil 3d you have relied on a command to Add Vertices to 3d plines. Things have changed and you need to recalibrate your skills. After getting over my initial anger and frustration thinking I’ve lost functionality. I found a blog post by Scott McEachron that brought the “duh” back into my internal conversation.
Insert Elevation Point then use the Increment option.
Thanks Scott
I see that you are able to add verticies when using the command “Insert Elevation”, but you have to select one line at a time… In land desktop you could just window all the lines you wanted and it would allow the user to add vertices to them.