Compressing an image before storage can cause a deterioration of its quality. The more an image is compressed, the greater the loss of quality. The image quality setting specifies the compression ratio to be used when an image is stored in memory. You can select an image quality setting to suit your needs for higher quality or smaller file size.
JUST FOLLOW THESE STEPS
In a REC mode, press [MENU].
Use and select the "Quality" tab.
Use and to select "Quality" and then press .
Use and to select the setting you want, and then press [SET].
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Note that this setting is valid for snapshots only.
and 
select the "Quality" tab.
and 
to select "
Quality" and then press 
