Samsung SDH-B74041 User Manual page 58

Secondly, select record type (Normal record, Motion and All) and channels, and then click
" ", and time axis panel will display specific time quantum. On the time axis, red
part stands for Motion, yellow stands for normal record and original part stands for no record
during this period.
Before playback, choose to enable playback 4 channels synchronously. If you tick-select
"
otherwise, you could separately control the channels playback.
Thirdly, start playback
Click to start record playback. When mouse curse is moving on the time axis, the time
point of current position will be displayed on the time axis screen. Click to locate the record.
Click the icon
", that means the selected channel will playback synchronously;
or to zoom in/out the time bar display ratio.
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