An image forming apparatus comprises: a display which allows users to connect a first icon to a second icon on a first screen and is capable of displaying the first screen with a still image of the first icon in motion and a second screen matching an event; a completion detector which detects completion of the connecting operation; a processor which performs an operation predetermined for the first and second icon when the connecting operation is completed; an event detector which detects occurrence of an event during the connecting operation; and a controller which performs, if an event occurs before completion of the connecting operation, a control operation consisting of: storing composition information of the first screen with a still image of the first icon in motion; interrupting the first screen; and reproducing the first screen after disappearance of the second screen on the basis of the composition information.