How to collaborate in real-time on blueprints via co-editing
The Blueprint Editor allows you to see which members are making edits to any step description. Please note that this is at a per-step level. We don't currently have "everything in real-time" i.e. you won't see a new step on the left if someone else on the same blueprint adds it (although we are working on that).
In short - for any unique rich text field - if someone else is editing or viewing it - you will see who they are, and one or more people can effectively "co-edit" that specific step description.
As an example - see the screenshot below, the indication shows that two members are editing the step description at the same time: