In a literary form such as comics that combines images and texts punctuation is due to play a specific function. From its invention in the beginning of the 19th century, creators like Topffer or Dore played with it, especially the expressive signs, imitating what happened at the same time in numerous novels. The habit of overloading the images, with exclamation and interrogation marks or dashes, leads however progressively to saturation in the golden age of superheroes comics and therefore to a sort of punctuation crisis. Questioning increased on the ideological meaning of such signs, which lead to rethinking what punctuating meant. Nowadays graphic novelists tend to invent new uses of the signs which question the way making language visible can produce interesting meanings. (Contains 11 figures and 5 footnotes.)