Procedures for panning, zooming in and out, rotating and tilting the map. (a) Procedure for panning. The map can be panned both directions vertically. (b, c) Procedure for zooming in: (b) the user moves hands together and engages them, then (c) moves them apart. (d, e) Procedure for zooming out: (d) the user moves hands apart and engages them, then (e) brings them together. (f) Procedure for rotating the map. (g, h) Procedure for tilting the map: (g) the user engages the hands and then (h) moves one forward, and one to the back. See Figure 6(d) for alternative view.