Different ‘virtual camera’ positions, along with other M/E attributes, can be stored in the Comp Bin associated with each M/E.

In particular, T-Bar and most Positioner attributes for all layers in the module are stored in a Comp, and are re-applied when you click the Comp icon later.  This includes such things as cropping and edge-feathering performed using Positioner settings (layer source selections are not stored, nor are Border or Tracking settings.

Note: TriCaster models 410, Mini and Mini SDI provide a Preset Bin in place of the Comp Bin.  These presets affect only the Background layer.  Also, some LiveSets (e.g., double-box sets) do not support zooming and panning.  In such cases, Comp/Preset selection and T-bar actions may be inoperative.


Managing Comps

Having prepared a composition you wish to keep, storing a corresponding Comp is simply a matter of clicking the COMP button above the T-Bar, and clicking an empty position in the Bin.  An image grabbed from output of the module is displayed to represent the Comp.

If you later wish to revise a Comp, you can do so either by rolling the mouse over it and clicking the ‘snapshot’ icon shown at upper-right (Figure 176) or by right-clicking the icon and selecting Update in the context menu that appears (Figure 177).

The context menu also allows you to Rename a Comp, or clear it entirely.



Making a selection in a Comp Bin changes the current composition of layers displayed by the module to the new one.  The change can be immediate, or animated over time.  This is controlled by the duration set for individual layers in the numeric control below the thumbnail monitor for each layer.


Hint: The main Switcher also hosts a Comp Bin.  However, LiveSet effects are not supported in this case.

It’s worth noting that, since T-Bar states are stored and applied by Comps, TriCaster’s transition effects can be applied by selecting a Comp.

Let’s discuss an example:

  • Suppose KEY 1 is a lower third type title overlay, and has a ‘fly on’ type transition assigned to it.
  • Comp 1 was stored with KEY 1 not visible.
  • Comp 2 was stored with KEY 1
  • Click Comp 1, then – a moment later - Comp 2.

The result is that KEY 1 will animate in and out according to the state stored in each Comp.


Actually, Comps can apply transitions to multiple layers at one time with a single click.  Animation between the current layer states and settings is not limited to the effects provided by transitions, however.  Let’s consider a different example.


  • Select Comp 2, ensuring that KEY 1 is visible.
  • Use the Positioner controls for KEY 1 to slide the lower third title off the page (Figure 178), completely hiding it from view.
  • Store a new Comp.

Switch back and forth between these two Comps and you’ll notice that animating the layer’s position of the layer has effectively allowed you to create a custom transition.  Experiment with other settings, such a Z or Y axis rotation and you’ll begin to see just how much power Comps give you.

Using these and other settings to animate the various video layers, very complex compositions can be introduced into your production with a single click in the Comp Bin.



We should mention again that the duration of the animation from the current state/position of a layer to the one stored in a Comp is controlled by the effect duration controls for each layer.  This means that each layer can be animated more quickly or slowly according to your wish. 

Note: The effect duration for individual layers is not stored in Comps.  Rather, any animation is governed by the current setting for the layer, as established in the user interface at the time a Comp is applied.


Section 14.8

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