A typical transition workflow includes the following steps:
You can add a transition by dragging its icon from the Effects panel into the Timeline panel, or by applying the default transition using a menu command or shortcut.
You can add several
clips to a sequence at once, and automatically add a default transition
between them. (See Add clips to a sequence automatically.)Click the transition in the Timeline panel to display its properties in the Effect Controls panel. You can change its duration, alignment, and other properties.
Play back the sequence, or drag the current‑time indicator through the transition to see the effect. If the playback is not smooth, press Enter (Windows) or Return (Mac OS) to render the sequence.