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Building the Movie > Building the Movie - Pg. 153

Editing the Transition You can edit the transition in several ways: You can change its length, its type, its direction (certain effects only), or all three. To do so, click the transition icon, and then click the Trans button (if the Transitions pane isn't already open). You can now adjust the Speed slider, click another transition in the list, or both. (For the Push and Billow effects, you can also change the direction of the effect.) When you click Update--a button that's available only when a transition icon is highlighted in the Movie Track--iMovie automatically re-renders the transition. Tip: You can also adjust the effect on several clips simultaneously. Just select the ones that you want to edit (c-click each one)--or, to select all transitions in the whole movie, click one and then choose EditSelect Similar Clips. (The selected transition clips don't have to have matching transition types; you can click one Disintegrate, one Twirl, and one Push, and then change them all to the same Cross Dissolve.) Now make the changes you want, and then click the Update button shown in Figure 6-4. Creating a Transition Deleting a Transition If you decide that you don't need a transition effect between two clips after all, you can delete it just as you would delete any Movie Track clip: by clicking it once and then pressing the Delete key on your keyboard (or by choosing EditClear). Delet- ing a transition clip does more than eliminate the icon--it also restores the clips on either side to their original conditions. (If you change your mind, EditUndo Clear brings back the transition.) Transition Error Messages Transitions can be fussy. They like plenty of clip footage to chew on, and once they've begun rendering, they like to be left alone. Here are some of the error messages you may encounter when working with transitions. When you delete a clip For example, if, in the process of editing your movie, you delete a clip from the Movie Track that's part of a transition, a message appears (Figure 6-6) that says: "This action will invalidate at least one transition in the project. Invalid transitions will be deleted from the project. Do you want to proceed?" iMovie is simply telling you that if you delete the clip, you'll also delete the transition attached to it (which is probably just what you'd expect). Click OK. If you frst click "Don't ask me again," iMovie will henceforth delete such clips without asking your permission. When the transition is longer than the clip If you try to add a 5-second crossfade between two 3-second clips, iMovie throws up its hands with various similarly worded error messages (Figure 6-6, left). In all cases, the point is clear: The two clips on either side of a transition must each be longer than the transition itself. chapter6:transitionsandeffects 153