Click the zoom button (Resize), and check for a nonconformance means width * height, approximately 1366 * 768 without too high and too wide to fit on the desktop screen shots.
Click on the Reduce / Enlarge (Resize) and define the width * height * 768 to about 1366. , by not too high and not too wide. To make the image fit the desktop.
Click on the button, zoom (Resize) and define the width * height to about 1366 * 768 without too high and not too wide to fit the screen image Desktop.