Disclosed are a system and a method for interacting with electronic devices using a single-point gesture. A single point is selected in an image provided by a display associated with an electronic device. The selected point is continuously moved to generate a trajectory. A bending of the trajectory is monitored while moving the selected point. In response to the monitoring of the bending, the electronic device is operable to perform, based at least on the bending of the trajectory, a designated action. For example, the image is moved along the trajectory and while being moved the image is zoomed in when the trajectory bends clockwise and the image is zoomed out when trajectory bends counterclockwise. The scale of zooming is determined based on an area between a segment trajectory and a chord of trajectory found in a pre-determined time period or a pre-determined travel distance along the trajectory.