Multi-surface environments, which may contain anycombination of large, high-resolution display walls(powerwalls), interactive tabletops, xed computinginfrastructure, laptops, tablets, and smartphones all linkedtogether, oer a rich opportunity for new interactions andcollaboration. Creating applications for theseenvironments, however, breaks many of the assumptionsof traditional computing environments, and requires aredenition of the meaning of what constitutes anapplication. Furthermore, they present challenges whenfaced with a heterogeneous environment consisting ofboth new multi-surface applications and legacy data andapplications