Canon PowerShot SX70 HS Digital Camera - Manual (Page 189)

Using Eco Mode
This function allows you to conserve battery power in shooting modes.
When the camera is not in use, the screen darkens to save battery life.
1
[Eco mode]
On
The screen darkens when the camera is not used for
approximately two seconds; approximately ten seconds after
darkening, the screen turns off. The camera turns off after
approximately three minutes of inactivity.
To activate the screen and prepare for shooting when the
screen is off but the lens is still out, press the shutter button
halfway.
Off Do not use Eco mode.
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