Canon EOS 5D Mark III Instruction Manual (en)

Shooting with the LCD Monitor
(Live View Shooting)
You can shoot while viewing the 
picture on the camera’s LCD 
monitor. This is called “Live View 
Live View shooting is enabled by 
setting the Live View shooting/
Movie shooting switch to <A>.
Live View shooting is effective for photos of still subjects.
If you handhold the camera and shoot while viewing the 
LCD monitor, camera shake can cause blurred images. 
Using a tripod is recommended.
About Remote Live View Shooting
With EOS Utility (provided software, p.394) installed in your 
computer, you can connect the camera to the computer and shoot 
remotely while viewing the computer screen. For details, refer to 
the EOS Utility Instruction Manual (p.396).