Select the Zoom tool from the toolbar.
View images with the Zoom tool
Magnify or reduce the view of your image with the Zoom tool.
In the tool options bar, choose the Zoom In option to magnify your view or the Zoom Out option to reduce the image view.
Click the area you want to zoom in or out in your image. Each click magnifies or reduces the image to the next preset percentage and centers the display around the point you click.
In the tool options bar, you can select from these zoom options and set a zoom percentage: Resize Windows to Fit, Zoom All Windows, Scrubbly Zoom, Fit Screen, and Fill Screen.