The Zoom tool allows you to zoom the image in the Image
Plane viewing area in or out.
From the Image Plane tab, left click the Zoom icon to
zoom in on the image.
Note: The current zoom percentage is displayed to the Zoom field.
Right-click the Zoom icon to zoom out.
Optional: Manually enter a zoom percentage directly into the Zoom field.
Tip: The Zoom tool has no effect on the image in the modeling window. To scale the images in the graphics
area, use the graphic manipulator handles to resize the image plane.