1. A mobile terminal, comprising: a memory configured to store at least one touch gesture to which a specific function is assigned; a touchscreen having a screen configured to receive the at least one touch gesture; and a controller configured to: control the touchscreen to display a trajectory line of the received at least one touch gesture on the screen such that the trajectory line can be discriminated from other information displayed on the screen; search the memory for the function assigned to the received at least one touch gesture; and execute the function assigned to the received at least one touch gesture.