Sony MHS-PM1 Handbook page 32

Viewing images
To view an enlarged image (playback zoom)
Slide the zoom lever toward T while displaying a still image.
To undo the zoom, slide the zoom lever toward W.
Adjust the position: v/V/b/B
Cancel playback zoom: Press the multi-selector.
To return to the index screen
Slide the zoom lever toward (Index) while displaying a still image or pausing the playback
of a movie.
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