A display apparatus includes: a display unit; and a control unit, wherein the control unit is configured to: set an irradiation condition of a laser beam for a thermally expandable sheet, a surface of the thermally expandable sheet being heated and expanded by being irradiated with the laser beam; display, on the display unit, a preview of an irradiation region of the thermally expandable sheet to be irradiated with the laser beam so as to be distinguishable in a display mode according to the set irradiation condition; allow the irradiation condition for expanding the thermally expandable sheet to a predetermined height to be selectable from among a plurality of mutually different irradiation conditions; and display, on the display unit, a preview of the plurality of irradiation conditions in mutually different display modes.