Abstract: A processing device is configured to provide a user interface comprising a radial layout soft keypad. The radial layout soft keypad comprises a central region and one or more concentric groupings of keys arranged around the central region. For example, the one or more concentric groupings of keys may be arranged as multiple concentric circular rows of keys substantially surrounding the central region, with all of the keys of the concentric circular rows being simultaneously visible in the radial layout soft keypad. The radial layout soft keypad is illustratively presented on a display associated with the processing device and a user interacts with the radial layout soft keypad by making hand gestures in free space in a field of view of an image sensor. A gesture of a first type controls selection of a key and gestures of second and third types control acceptance and rejection of the selected key.