DISPLAY CONTROL DEVICE, DISPLAY CONTROL METHOD, DISPLAY CONTROL PROGRAM, AND PROJECTION DEVICE

A display control device causes a display unit to generate a first predetermined image representing a first presentation image that indicates a first speed limit. Change in a speed limit of a road where a vehicle travels from a first speed limit to a second speed limit different from the first speed limit is recognized. When the recognized change in the speed limit indicates decrease, the first predetermined image is switched by a first switching method so that a second predetermined image representing a second presentation image that indicates the second speed limit is generated. When the recognized change in the speed limit indicates increase, the first predetermined image is switched by a second switching method different from the first switching method so that the second predetermined image is generated.