there are several ways to preview your effects:

    · preview from positioner click the preview button at the bottom of the page, or press spacebar.

    · preview a specified range on the ruler, click the frame number where you want your preview to start. then hold down the shift key while clicking the frame number where you want your preview to end. your selected range becomes highlighted on the ruler. click the preview button to view the range you've specified. to clear the selected range, ctrl+click the ruler.

    · start a preview at a specified frame on the ruler, double-click the frame number where you want your preview to start. your effect is played from this point until its end.

    · scrub through your effect drag the positioner through the section of the effect you want to preview.

    · preview only one track's effects hold down the f2 key while using any of the preceding methods for previewing your clip. your clip is shown with only the effects of the highlighted track applied.

    · preview without effects press ctrl+f2 while using any of the preceding methods for previewing your clip. your clip is shown without any effects from the tracks (that is, your original clip is displayed).