Based on a BDreportage, a web-documentary and an online newspaper, three objects specifically designed for the web, this article discusses the impact of computer or tablet screen features on setup, mediation and mediatisation of statements. The study seeks to show how, on the one hand, the semmiotic management of the screen benefits from polysemioticity based on multiple languages and genera, visual, sound or scriptural, thanks to a skill acquired in previous media, which is what is referred to here as semitic channels. This communication performance of the screen is achieved, on the other hand, by updating the markers of the statement, inventing, according to Gérard Genette’s term, a new paratext, in particular interactive text.