1. User interface for a mobile handheld computer unit, where said computer unit comprises a touch sensitive area, which touch sensitive area is divided into a menu area and a display area, where said computer unit is adapted to run several applications simultaneously, and to present an active application on top of any other application on said display area, characterised in, that said menu area is adapted to present a representation of a first, a second and a third predefined function, that said first function is a general application dependent function, that said second function is a keyboard function, that said third function is a task and file manager, and that any one of said three functions can be activated when said touch sensitive area detects a movement of an object with its starting point within the representation of said function on said menu area and with a direction from said menu area to said display area.