A control device includes a processor configured to: perform movie display control of causing a display to sequentially display images acquired in time series, and still image display control of causing the display to display any of the images as a still image； detect a first operation on a switch； determine whether a predetermined operation condition for the switch is satisfied, after the first operation has been detected； switch, when the first operation is detected while the movie display control is being executed, from the movie display control to the still image display control and causing the display to display, as a still image, an image displayed at a timing at which the first operation is detected； and cause, when the processor determines that the predetermined operation condition is satisfied, a memory to store the image displayed as a still image under the still image display control.
