Zooming on a form through the Show Zoom Control icon You can zoom in and out on a form using the zoom icon. Click the Show Zoom Control icon (+ symbol in a circle) on the top right of the task bar. Slide the ruler to the left to make a form larger; slide the ruler to the right to make it smaller. When you are finished zooming, click X on the ruler to close it. You cannot perform another action when the ruler is open.