Selecting Sources

In standard Switcher mode, video sources for PGM (Program) and PVW (Preview) rows are selected individually by pressing buttons on those rows.
By contrast, selecting a button on the single row in express mode first places the designated source on the (unseen) Preview bus, then immediately switches it to Program output.
For DSK/Key layers, source selection is made using a drop-down menu above the integrated viewport located in the DSK/Key control group.

Hint: Right-click input buttons to select sources from video routers (see Configuring Routers).

Viz Vectar Plus User Guide