Drawing upon a broad range of disciplines, such as literary theory, visual semiotics, pragmatics, sound symbolism and media studies, this article will introduce, explore and define the relationship between words and pictures in imagetexts. It will then apply these findings to the discourse concerning the use of expressive sound symbolic forms in comics, in order to elucidate the ambivalent relationship that these intrusive sensorial elements have with images as presented in comics and with their younger audiences. In particular, this article will show how the presence of ‘lettering’ (e.g. textual features) fosters the dynamicity of the genre but, at the same time, poses issues when it comes to defining its close amalgamation with the visual image. The dual main aim is, first, to show how the presence of onomatopoeia shapes the way we perceive the conventions of imagetexts, comics above all, and, secondly, to underline the importance of the younger reader as a ‘self-regulating’ protagonist in the process.