NewTek TriCaster 855 - Manual (Page 79)

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1. Cast your eyes over the Preview and Program monitors; consider what you see there,
and how it relates to the Transition Delegate controls:
a. The Program monitor shows DSK 1, currently assigned to Graphics (or Title),
over the current BKGD layer. The latter, at the moment, is the Program row
selection.
b. The Preview monitor shows DSK 2, assigned to Still (or DDR 2) overlaid on the
current Preview row selection.
The Look Ahead Preview monitor (or simply, Preview) is showing us the composition that will
result if a Take or Transition operation is performed – a look into the future, if you will.
2. Hold down Ctrl on the keyboard, and click the BKGD Delegate button (de-selecting it).
Note that, after de-selecting the BKGD delegate button, the Preview monitor no longer shows the
Switcher’s Preview row selection. Why is that? At this moment, only the DSK 1 and DSK 2
buttons remain lit – thus only those two video layers will be affected by a main Take or Auto
operation. The result will be as follows:

DSK 1, currently seen on Program out, will be removed from view

DSK 2 will be overlaid above Program instead.

The BKGD layer will not change in this case. Hence Preview correctly depicts the
outcome of a Take or Auto, just as we’ve mentioned.
The Look Ahead Preview allows you to switch with real confidence; the Transition Delegate
features provide flexible and convenient video layer management, and thus enhanced control
over your ultimate Program output composition.
4.7 RECORD AND GRAB
Figure 57
Located immediately beneath the Program monitor are Record, Stream and Grab buttons (along
with their respective Configure buttons). We’ll discuss streaming further on, but let’s consider
Record and Grab here.