Canon EOS M100 User Manual page 166

: Minimum
4
Set up the camera
Adjusting the Flash Output
Choose from the three flash levels in [
/
: Maximum
[ 5] → [Flash
z
Control] → [Built-
in flash settings] →
[Flash Mode] →
[Manual flash] →
button
] modes.
5
Raise the flash
/
6
Adjust the flash
output