The purpose of this paper is to identify a function for some of the graphics which may be found in Wittgenstein's writings. Not all the graphics function in the same way, but so little has been written about them that an outline of the function of even a few would seem to make a useful contribution. I describe the graphics in relation to seven key [lexical] concepts taken from the co-text (criterion, symptom, calculation, proof, explanation, description, paradigm). By adopting a content-model for the interpretation of the graphics, and comparing them to the key lexical concepts it is concluded that graphics function normatively in that they establish the underlying grammatical structure of concepts such as proof.