Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. A scale drawing shows a real object, with accurate proportions, reduced or enlarged by a certain amount ...

Most iPad drawing apps take a rather old-fashioned approach. They try to mimic paper and pencil, or paint and canvas, and of course they never get it quite right, even with pressure-sensitive styluses ...

Although tablets have opened up a whole new range of possibilities for architects and designers, using them for drawing and doodling is often a clumsy experience. In many cases there's far too little ...