RE: face used by header line

[Drew Adams]

> When I use info, the top line of the (emacs) window shows the current
> node etc.  How do I find out what the various faces used by that line
> are?  I obviously cannot put the cursor on that line and C-u C-x = like
> I normally would do.

One way to see what a given face is, when it's not easy
to use `C-u C-x =', is to use `M-x list-faces-display'
and look for a face that has the same appearance.  You
can also look for face names that might correspond.

In this case, search for "info" to see the Info faces.