Info mode, create one.
The @code{header-line-active} and @code{header-line-inactive} faces (which
-are the ones used on the header lines) inherit from this face.
+are the ones actually used on the header lines) inherit from this face.
@cindex faces for header lines
@item header-line-active
GNU ELPA instead.
+++
-** New face 'header-line-active'.
-This inherits from the 'header-line' face, but is the face actually used
-on the header lines (along with 'header-line-inactive').
+** New faces 'header-line-active' and 'header-line-inactive'.
+These inherit from the 'header-line' face, but the faces actually used
+on the header lines are now these two: the selected window uses
+'header-line-active', non-selected windows use 'header-line-inactive'.
\f
* Editing Changes in Emacs 31.1