Olympus IS-1 - Manual (Page 26)

* While keeping the shutter release button
pressed halfway, change the position of your
subject in the viewfinder to achieve the
desired composition.
*Press the shutter release button fully to take
the picture.
*To cancel spot metering during operation,
press the SPOT button again.
NOTE: Spot metering is possible in either P, A or
M modes.
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