Display device, a display method, a display program

A display device displaying presentation data including a plurality of pages includes: a presentation data reception portion to receive the presentation data from a presenter device; a page number reception portion to receive from the presenter device a page number of a page displayed by the presenter device among a plurality of pages of the presentation data; a display control portion to display an image of a page having the received page number among a plurality of pages of the presentation data, in a follow mode, and to display an image of any given page of a plurality of pages of the presentation data, in a write mode; a handwritten image detection portion to detect a handwritten image in the write mode; a temporary storage portion to, if a follow mode set instruction to set the follow mode is accepted in the write mode, store temporary storage data in which the handwritten image detected by the handwritten image detection portion is associated with a page number of a page displayed by the display control portion when the follow mode set instruction is accepted, among a plurality of pages of the presentation data; and a return control portion to, if a return instruction is accepted in the follow mode, allow the display control portion to display an image in which a handwritten image specified by the temporary storage data is superimposed on an image of a page having a page number specified by the stored temporary storage data among a plurality of pages of the presentation data.