[EDIT: Note that much of this post is no longer relevant since the release of VW2021 which revamped all smart markers]
I know Vectorworks has stated over the last few years that its goal is to make tools more cohesive and intuitive. While there are many things that have improved, I need to call out the current state of Section Lines / Section-Elevation Markers as being a complete hot mess.
Despite being an experienced Vectorworks user, it seems like e