This hook is run after selecting an article. It is meant to be used for
highlighting the article in some way. It is not run if
This hook is called when a summary line is changed. It is not run if
This is the face (or font as some people call it) used to highlight the current article in the summary buffer.
Summary lines are highlighted according to this variable, which is a
list where the elements are of the format
. face). If you would, for instance, like ticked articles to be
italic and high-scored articles to be bold, you could set this variable
to something like
(((eq mark gnus-ticked-mark) . italic) ((> score default) . bold))
As you may have guessed, if form returns a non-
face will be applied to the line.