I stumbled across the "roadmap" view in the release backlog, and I'm wondering if I can use it for the following purpose.  I'd like to depict, at a high level, when certain major pieces of functionality are planned to start and finish.  For example, this may feature or these epics are intended to have work started in March and finish up in May.  I don't really care about actuals here, I just want to show a plan for a roadmap vision.

I tried creating a dummy task and making it a child of epic, but it didn't show up on the roadmap timeline. I can see that some of my epics have hollow bars on the timeline that start at various dates but end at the completion of the project.  I got confused with how this is supposed to work and am now posting this for some additional guidance.

Can anyone help?

Thanks,

Joe