Mind on Paper is a different mind than Mind on Mind. The idea is to have an extended mind by randomly scribbling the discussion or inner chat or video on paper. "Where-What is the mind?" has been a subject of inquiry for millenia. It further boils down to pointing to something structural (brain or body or both). Or some pointing to the  functions of the mind. The structural-functional dichotomy finds itself into further nuance in today's day and age. Many schools. One of them called 4P cognition and another called 4E cognition. Both schools evoke a wider nuanced location of the structure-function of one's mind...and that it is not restricted to the person or individual. Hence, cultivating practices like "putting mind on paper" or doodling minutes of discussions, could be a way to build a personal-extended-mind...a mind not on mind but a mind on paper. 

4P: Propositional Knowing, Procedural Knowing, Perspectival Knowing, Participatory Knowing

4E: Embodied cognition, Embedded cognition, Extended cognition, Enactive Cognition

These images are rough specimen of putting mind on paper.