These commands add various frivolous display gimmicks to the article buffer in Emacs versions that support them.
X-Face headers are small black-and-white images supplied by the
message headers (see X-Face).
Face headers are small colored images supplied by the message
headers (see Face).
Smileys are those little ‘:-)’ symbols that people like to litter their messages with (see Smileys).
Picons, on the other hand, reside on your own system, and Gnus will try to match the headers to what you have (see Picons).
Gravatars reside on-line and are fetched from http://www.gravatar.com/ (see Gravatars).
All these functions are toggles—if the elements already exist, they'll be removed.
gnus-article-html, then you can insert any blocked images in the buffer with this command. (