In one of our previous blog articles we talked about the use of pie menus in touch screen interfaces and discussed pros and cons of this kind of interaction. In this article, we are going to show a concrete example of how a pie menu can be used.

In recent years, so called “natural user interfaces” (NUI) have grown in popularity. More and more often, interaction via touch and gestures is employed instead of using mouse and keyboard. The iPhone was greeted with great enthusiasm and played a major part in spreading touch screen system in the consumer market while also introduced gesture-based interaction in a playful way. There should be hardly any touch screen user who is not familiar with the pinch gesture that is used to resize or zoom images on the iPhone.