Throughout this manual you've probably noticed lots of variables called
gnus-summary-mode-line-format. These control how Gnus is to
output lines in the various buffers. There's quite a lot of them.
Fortunately, they all use the same syntax, so there's not that much to
be annoyed by.
Here's an example format spec (from the group buffer): ‘%M%S%5y: %(%g%)\n’. We see that it is indeed extremely ugly, and that there are lots of percentages everywhere.
Currently Gnus uses the following formatting variables:
All these format variables can also be arbitrary elisp forms. In that
case, they will be
evaled to insert the required lines.
Gnus includes a command to help you while creating your own format
specs. M-x gnus-update-format will
eval the current form,
update the spec in question and pop you to a buffer where you can
examine the resulting Lisp code to be run to generate the line.