The use of digital tools has become central in many creative practices. However, research into the design and use of such tools has thus far fallen in between the disciplinary cracks between HCI and Creativity Research. In this position paper, I offer a brief overview of our work on exploring and developing digital tools for collaborative creative work that integrates approaches and insights from these two disciplines. On this basis, I offer two theoretical perspectives for discussion at the the Rethinking Interactions workshop: shearing layers, building on studies of architecure in use [Brand 1994]; and the instruments of inquiry framework [Dalsgaard 2017], building on pragmatist philosophy.