I'd like to know exactly what my modeline is telling me and how it's derived. Right now, if I'm working with a graphical terminal I can hover over each modeline entry in turn, and if I'm lucky, a tooltip will pop up; obviously, this won't work in a console. Alternately I can examine the
mode-line-format variable, but it's not at all obvious how the values correlate to what's displayed.
Ideally I'd like something within Emacs that would explain, for example, how am I getting from
"%e" in mode-line-format to
U:---, what that means and where to get more information: “
U:--- comes from
mode-line-format and means this, that and the other. You can customize it here.”
Is there a mode or tool that will help me?