The terminological strength of the film and photography concept depth of field cand be applied
as a powerful leitmotif to think about interfaces. Where and how can we find or create new and
surprising relations between the surface and its depth? Where and how can we design experiences
that are open rather than narrowly focused on functional user flow - experiences that allow for
unexpected events to occur and which foster serendipity? How can we think about and focus on
the depth of the interface? In other words how can we render visible the numerous layers that
are hidden behind the interface? The perspectives gathered in this journal issue access the
notion of the interface from different angles and in various levels of depth. Some go deep
beyond the surface and look into the algorithms into the code and shine a light on that which
usually remains hidden in the opacity of the inside. Some focus on a specific aspect of the
surface like a long continuous shot that reveals details or significant shifts. And some
render the interface transcendent and other-worldly through its appearance.
