Voir la source de Utilisateur:WikiSysop/monobook.css

/* Le CSS placé ici n'affectera que votre skin Monobook */

/*
.ns-0 * #content, .ns-0 * #p-cactions li, .ns-0 * #p-cactions li a {
  background:#FFEEEE; /* couleur rose comme les pages de discussion */
}

.ns-0 #toc {
    counter-reset: chapter -1;
}
.ns-0 H1 {
    counter-reset: chapter;
}
.ns-0 H2:before {
    content: counter(chapter) " - ";
    counter-increment: chapter;
}
.ns-0 H2 {
    counter-reset: section;
}
.ns-0 H3:before {
    content: counter(chapter) "." counter(section) " · ";
    counter-increment: section;
}
.ns-0 H3 {
    counter-reset: sousection;
}
.ns-0 H4:before {
    content: counter(chapter) "." counter(section) "." counter(sousection) " · ";
    counter-increment: sousection;
}
*/