Strategy: Hold down the Ctrl key while rolling the mouse wheel. Roll away from you to zoom in. Roll towards you to zoom out. Additional Details: Most people use the scroll wheel to scroll up and down. Did you know that you can also use the mouse to scroll side to side? Click and hold the mouse wheel then move the mouse left or right to scroll. Score: 4.6/5 (71 votes) . If your keyboard is near your mouse, you can hold the shift key down while you operate the scroll wheel. The window should scroll left and right.Of course, the left and right arrow keys will scroll the contents of a window left or right in short steps. How do I scroll sideways in Word?.