Canon POWERSHOT SX150 IS User Manual page 17

You can magnify the area of a recorded image that was inside the AF Frame
to check the focus.
Press the D ISR button to switch to
the focus check display (p. 40).
A white frame will appear where the AF
frame was when the focus was set.
A gray frame will appear on a face
detected during playback.
The area within the orange frame appears
magnified.
Switch frames.
Move the zoom lever toward O. once.
The screen shown on the left will appear.
Press the Q button to move to a different
frame when multiple frames appear.
Change the magnification level or
location.
Use the zoom lever to change the display
size, and the .A.v4_ buttons to change
the display position while checking the
focus.
Press the MENU button to reset the
display to Step 1.
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