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Another switcher-style source selector, labeled Overlay, is situated right above the Input A row. At right Just above that you will also see local transition controls that are quite similar to those found in the Switcher’s Transition pane. Really, the Virtual Input Overlay feature matches the DSK channels found in the Switcher’s main Transition section in almost all respects. Unlike the DSKs, though, its inclusion in Virtual Input tabs make it a ‘pre-Switcher’ video layer (along with Input A and B). This means that the Overlay is applied before that composition is sent to the Switcher.