Strong SRT 5500 User Manual page 21

Press the [VOL+]/[VOL-] to increase or decrease the volume accordingly.
The current volume level will be shown on the bottom of the screen.
Subtitle
Press [SUBT] to navigate between available
subtitles of the currently viewed channel or to turn
them off. Subtitle selection will be displayed on
top right hand of screen.
Aspect
Press [ASPECT] to navigate between available
options which are, 16:9 Full, 16:9 Letter Box, 16:9
Pan Scan, 4:3 Full, 4:3 Letter Box and 4:3 Pan
Scan, your selection will be displayed on the top
right hand corner of the screen.
Audio
Press [AUDIO] to Navigate between available
sound tracks of currently viewed channel.
Recall
Press [Recall] to switch between current and the previously viewed channels.
Mute
Press [MUTE] to mute the sound. Press again to
restore sound.
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