NewTek TriCaster 8000 - Manual (Page 198)

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You have just delegated the controls below to two video layers. You can likely guess
what comes next.
 Press Auto or Take, and observe the result.
 Now add DSK 2 to the delegate selection, and switch again.
The BKGD layer is updated, DSK 1 is removed, and DSK 2 is displayed.
Hint: The Look Ahead Preview monitor respects your Transition Delegate selections,
allowing you to configure layers for upcoming switcher operations with great confidence.
A progress bar beneath the each of the DSK control groups tracks transition
progress (progress bars remain fully ‘on’ when a layer is 100% displayed).
FTB
Let’s discuss the final button in the Transition Delegate group – FTB.
The acronym (i) stands for Fade to Black. The result of selecting the FTB delegate
and displaying the video layer it controls will not likely surprise you very much. FTB
offers a convenient method of doing precisely what its name implies, simply fading
Program Output out completely (to black).
It might help to think of FTB as ‘DSK 5’, since it represents a final video layer added
above all others before ultimate Program output. FTB has several unique
characteristics, however. For one thing, DSKs can display colorful video sources
(with or without transparency); the FTB video layer is always 100% opaque black,
and completely obscures everything below it.
Note: Like the DSK layers, hiding or displaying FTB triggers both Autoplay and Audio
Follow Video when these settings are active for Media Players. FTB also fades Master
Audio to mute when displayed, and back up again when hidden.
Also unlike other video layers, FTB does not support custom transitions (pressing
Auto simply fades it on or off) or timing; FTB’s fade duration is drawn from the
BKGD layer setting.