A display device which performs previewing of print data for printing an image on a tape including: a division data generating unit for dividing the print data into N parts and thus generates N division data (where N is an integer that is greater than or equal to 1); and a previewing unit for loading a target division data including a target area of the previewing, of the N division data, into a work area and sequentially reads out the division data from the work area, thus performing the previewing; wherein the division data generating unit decides a value of the N in accordance with a tape width of the tape and a tape length in the case where the print data is printed.