Canon EOS REBEL T3 Basic Instruction Manual page 424

Bounce flash \
Use soft light to obtain a more
natural look.
Bounce flash means aiming flash at
0.
wall or ceiling in order to illuminate
the subject with reflected light. Because reflected light is softer than direct
light. bounce flash produces more natural looking photos. with light more
evenly balanced between subject and background.
J
os
I
Just mount the external flash
un~
on
EOS and point the flash head up!