[Evolution] Switching Between Message List and Preview Panes

["Gilchrist, Michael Aaron" <mikeg utk edu>]

I've recently been forced to abandon (al)pine as my email client after many
decades so forgive my unfamiliarity with Evolution's email settings.

Currently, I would like to set up a keyboard shortcut, such as Ctl-e Tab, to
toggle between the "Message List" and "Preview" panes within the Mail component
of Evolution. Is there a setting in dconf or ~/.config/evolution/accels that I
can use to achieve this?

Mike