A first task and a second task executable by a mobile computing device are associated with a first predefined symbol and a second predefined symbol, respectively. The first task and the second task are different types of tasks executable by the mobile computing device after the mobile computing device has been unlocked. Through a touch-sensitive display of the mobile computing device, a first gesture input from a user is detected while the mobile computing device is locked. The first gesture input represents the first predefined symbol. In response to the detecting the first gesture input, the first task is executed. Through the touch-sensitive display of the mobile computing device, a second gesture input from the user is detected while the mobile computing device is locked. The second gesture input represents the second predefined symbol. In response to the detecting the second gesture input, the second task is executed.