Well, I now realize that I have most of what I want with `mu4e-view-headers-next'. However, it will only "preview" the messages if I have already opened up one message in the view window and switched back to the headers buffer.
I still want to be able to do the initial step automatically, i.e., to view the current message and switch back automatically to the headers buffer.
Any ideas of how I can do this?
Thank you.