NewTek TriCaster 8000 - Manual (Page 72)

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FIGURE 43
 The monitor labels for sources currently visible on Program output are
highlighted in red (Figure 43). Labels for sources shown on Preview have a
green tint.
FIGURE 44
 Monitors provide other controls and displays on rollover as appropriate,
including things like Play or Stop and current position (timecode) in a clip
for Media Players, and Network source selection (Figure 44).