We adapted PowerPoint to support adaptation-aware editing and progressive update propagation. Adaptation-aware editing reduces download time by enabling mobile clients to edit PowerPoint presentations that have been aggressively adapted. Previous work [5] demonstrated that loading text-only versions of PowerPoint presentations can reduce download latency over bandwidth-limited links by over 90% for large presentations. The rest of this section evaluates the benefits of progressive update propagation, quantifies the latency for updating a PowerPoint presentation with higher-fidelity data, and discusses our conflict resolution policy.