To provide an image processor allowing the screen operation of a back face window to be efficiently performed even when a transparent window is displayed.

This information processing method for performing overwrite processing by displaying a transparent window for overwrite on the most front face of the display by overlapping it on a back face window being a window equipped with a scroll bar and displayed on the display, includes: a scroll bar region calculation step of calculating a region on the display of the scroll bar of the back face window; a detection step of detecting at which position on the display a position instructed by a point indication means is present on the transparent window; and an end step of closing the transparent window when the position detected by the detection step is present within the scroll bar region in the back face window.