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
Step 1
Hold your cursor over the spot you want to zoom in on.
Step 2
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.
Step 3
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
Step 1
Open the "System preferences" menu.
Step 2
Select "Keyboard and mouse," then "Trackpad."
Step 3
Check the box beside "Zoom while holding Control."
Step 4
Press "Ctrl" when on the screen you wish to magnify and run two fingers up the Mac's trackpad.
Step 5
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.