Canon POWERSHOT A480 User Manual page 76

If you press the shutter button halfway, the AF frame will magnify and you
can check the focus.
..... Select [AF-Point Zoom].
Press the MENU button and select [AF-
Point Zoom] on the i_1 tab. Use the ,_
buttons to select [On].
Check the focus.
Press the shutter button halfway.
In [Face AiAF] (p. 74), the face selected
as the main subject will appear magnified.
In [Center] (p. 75), the contents of the
center AF frame will appear magnified.
The display will not appear magnified in [Face AiAF] if a face cannot be detected
or is too big in relation to the screen. In [Center], it will not appear magnified if the
camera cannot focus.
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