Previewing transitions in your movie
Studio lets you preview transitions in the Player. Just drag and drop a transition into the Movie Window, click the Play button (or hit [Space]) and see how the transition works with your material.
You can also preview transitions by scrubbing through them in the Player or on the Timeline of the Movie Window.
Background rendering of Hollywood FX
Background rendering is an optional feature in which the computation needed to create a detailed preview of Hollywood FX transitions and other effects is carried out as a “background task” with no interruption of your workflow. You can configure background rendering on the Video and audio preferences options panel (Setup Ø Video and Audio Preferences).
Until the rendering of a transition is complete, the Player will preview it at reduced resolution and frame rate. A colored bar appears in the Timescale above the clip while background rendering is in progress.