Taken in an all-encompassing sense (as initiated by Werner, 1926), the notion of affordance allows us to think as a first approximation our perceptual relation to objects and especially to what we make of this relation as subjects. Transferring this psychological concept to the observation of linguistic data (Paveau, 2013) seems particularly opportune as it concerns its relation to the significance activity, in the sense of Gibson (1979). However, in addition to the successive re-readings that helped to adjust its application to emergence (Turvey et al., 1981), to cultural conventions (Norman, 1999, 2002), or as a disposition to act (Morgagni, 2011), some approaches related to phenomenology –ethnomethodological and enactivist, in particular– have discussed its operativity (Coulter & Sharrock, 1998, Varela et al., 1993).To examine, under its robustness, the precision of this concept, as one can understand its manifestation in discourse and interaction, we set out the transitional character of its operative value. Then, we observe how it can cross various praxeological categories (action, intentionality, resources, indexicality ...). A case study which implicates using artifacts to visualize and communicate (in a CCTV center) is taken as a support for our investigation.