Canon EOS Rebel T4i 18-135mm IS STM Lens Kit Instruction Manual page 242

d Playing Back with the Touch Screen
Reduce Image (Index Display)
Magnify Image
Touch screen operations explained on page 241 - 242 are also possible
while viewing images on a TV set connected to your camera (p.258, 261).
242
Pinch two fingers.
Touch the screen with two fingers spread
apart, and pinch your fingers together on
the screen.
Each time you pinch your fingers, the
screen changes from a single-image
display to a 4-image index display
and 9-image index display.
The selected image is highlighted in a
blue frame. When you tap the
selected image, it will displayed as a
single image.
Spread two fingers apart.
Touch the screen with two fingers
together, then spread your fingers apart
on the screen.
As you spread your fingers, the
image will be magnified.
The image can be magnified up to
10x.
You can scroll around the image by
swiping your finger.
Tapping the [2] icon on the screen's
upper right will return to the single-
image display.