MESSAGE DISPLAY DEVICE WHICH CHANGES A MANNER OF DISPLAYING A MESSAGE OVER TIME, AND A NON-TRANSITORY COMPUTER-READABLE MEDIUM STORING A MESSAGE DISPLAY PROGRAM CHANGES A MANNER OF DISPLAYING A MESSAGE OVER TIME

A message display device provided with a display section includes: an event acquisition section for acquiring an event that triggers display of a message on the display section and is associated with the message; a data acquisition section for acquiring a type of an application program and a display mode of an image to be displayed on the display section during execution of the application program; a data storage section for storing the type of the application program, the image display mode thereof, and a message display mode of displaying a message on the display section associated with one another; and a message display control section for, in response to acquisition of the event by the event acquisition section, displays the message associated with the event on the display section in the message display mode recognized from the data storage section.