Canon EOS Rebel SL1 18-55mm IS STM Kit Instruction Manual page 156

Shooting Function Settings
In Creative Zone modes, you can set the ISO speed by pressing the
<i> button.
With Live View shooting, you cannot set Drive/self-timer's <B> and
<M> settings.
When you set w (Partial metering) or r (Spot metering), a metering
circle will be displayed in the center of the screen.
During Live View shooting, the exposure is set at the moment the picture
is taken, regardless of the metering mode.
156
Exit the setting.
3
Press <0> to finalize the setting
and return to Live View shooting.
You can also select [2] to return to
Live View shooting.