Both Windows and Mac operating systems have useful zooming capabilities. Photo editing is easier when you zoom in on a specific portion of the photo. Websites sometimes have too-small writing. Maybe your eyes are tired or you're sitting farther than usual from your computer. Whatever the reason, when you want to see an enlarged version of a screen, it's helpful to know how to zoom efficiently.
On a Windows Operating System
Hold your cursor over the spot you want to zoom in on.
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Press "Ctrl" while simultaneously either rolling the middle button on your mouse forward or pressing "+" on your keyboard. If you're using the Windows XP or earlier operating system, this works on most programs and internet browsers. On Windows Vista or Windows 7 operating systems, it also works on your desktop and computer's folders.
Return the screen to normal -- or zoom out -- by pressing "Ctrl" and either rolling the middle mouse button toward yourself or pressing "-" on your keyboard.
On a Mac Operating System
Open the "System preferences" menu.
Select "Keyboard and mouse," then "Trackpad."
Check the box beside "Zoom while holding Control."
Press "Ctrl" when on the screen you wish to magnify and run two fingers up the Mac's trackpad.
Press "Command" and "Option" and "=" to zoom in if your Mac doesn't have a trackpad. If nothing happens when you do this, press "Command" and "Option" and "8" to turn your zoom function on.