Paper Title: Current sheet formation and reconnection due to photospheric footpoint motion and pre-existing magnetic field topology Author List: Buechner, J. Abstract: We investigated the impact of the observed photospheric footpoint motion on the formation of current sheets in transition region and corona as well as the topology of the consequent 3D reconnection. We provide arguments to improve the observation of the photospheric plasma motion because, as we show, it is necessary to consider both, the action of shear motion and the pre-existence of a specific magnetic topology for reconnection together to understand where, when and how reconnection can take place in the solar atmosphere. Poster: No