Being able to change the view magnification means that you can get up close and personal with numbers you need to double-check or zoom out for a big-picture view when you need to eyeball the design of an entire page. With most of the apps, you can control the view of your app easily by using the view controls in the lower-right corner of the app window.
Drag the Zoom control to the right.
The display enlarges.
Click the Zoom level.
The Zoom dialog box appears.
Click a new zoom level.
Alternatively, click Custom and enter a percentage for the size of the display.
Click OK to close the dialog box.
Click the view tools to the left of the Zoom control to see a different view.