Canon EOS REBEL T2I Instruction Manual page 32

Shootingwith the LCDMonitor
(LiveViewShooti
You can shoot whiJe viewing the image on the camera's
LCD monitor. This is catJed "Live View shooting."
Live View shooting is effective for stHJ subjects which do
not move,
if you handhoJd the camera and shoot while viewing the
LCD monitor, camera shake can cause blurred images.
Using a tripod is recommended.
With EOS Utility (provided software) installed in your computer, you
can connect the camera tQ the computer and shoo t remotely while
viewing the computer screen, For deta!l s, see the Software
Instruction ManuaI in the CD-RQM.