Abstract: A method and system for zooming an image on a touch screen. A trajectory, which is detected, is formed by a continuous direct touching of the screen by a finger of a user, beginning at a first point on the screen initially touched by the user and ending at a second point on the screen being touched by the user. It is ascertained that the screen has been touched by being pressed by the finger at one point on the trajectory for at least a predetermined minimum period of time or that a direction pointed to by a tangent to the trajectory at the second point is at an angle with respect to a specified reference direction on the screen that is at least a predetermined minimum angle. In response to the ascertaining, an initial image on the screen is zoomed-in or zoomed-out in a manner determined by the trajectory.