Disclosed is a display apparatus comprising: a display section including a first and a second display areas, which can set a first and a second coordinate systems; a memory storing an image file including image data, coordinate range data, and coordinate value table data; and a processor which performs: image file specifying processing specifying the image file; display processing which (i) reads out the specified data, (ii) controls a display of an image part among an image of the specified image data, (iii) sets the first coordinate system within a range overlapping the image part, and (iv) controls a display of plotted points of the first coordinate system, wherein the coordinate value table data correlates a coordinate value of the third coordinate axis with those in the first coordinate system, and the display processing sets the second coordinate system in the second display area, and controls a display of plotted points.