Previewing transitions To preview a transition, you can either build a preview of, or render-scrub, the section of the Timeline containing the transition. With render-scrubbing, you can see the transition's effect quickly, without waiting for Premiere to build a preview file. To build a preview of the transition: In the Timeline, move the yellow work area bar so it covers the transition and press Enter (Windows) or Return (Mac OS) to build a preview. To render-scrub the transition: Hold down Alt (Windows) or Option (Mac OS) and, when the cursor becomes a downward-pointing arrow (), scrub in the Timeline window's time ruler. Adding Transitions > Creating transitions > Previewing transitions |