See the attached image for what I mean. There should be an option to auto-fit the canvas size to fit the image size, so you don't have any canvas left over. When I view images in irfanview that canvas size takes up all of my window space, even though I need to view other images at the same time. This can be solved by manually fitting the window/canvas to fit the image size - but it becomes really tedious to do it over and over again. There should be an option to just autofit the canvas, or at least make the canvas transparent.