Figure 3

Text entry in dual mode: (a) virtual keyboard with eight rows and six columns showing the available characters (shifted versions for non-letter characters are shown in gray); (b) left-hand keys – arrow keys (here labeled “1” – “4”, cf. Figure 2a) are used to highlight one of the eight rows of the virtual keyboard; (c) right-hand keys – character keys correspond to the highlighted row; (d) word prediction list after entering “te”İ (i.e., “!2“5”).