tailieunhanh - Adobe Flash chuyên nghiệp - p 4

creating a keyframe A keyframe indicates a change in content on the Stage. Keyframes are indicated on the Timeline as a circle. An empty circle means there is nothing in that particular layer at that particular time. A filled-in black circle means there is something in that particular layer at that particular time. The background layer, for example, contains a filled keyframe (black circle) in the first frame. The photo1 layer also contains a filled keyframe in its first frame. Both layers contain photos. The photo2 layer, however, contains an empty keyframe in the first frame, indicating that it is currently. | Creating a keyframe A keyframe indicates a change in content on the Stage. Keyframes are indicated on the Timeline as a circle. An empty circle means there is nothing in that particular layer at that particular time. A filled-in black circle means there is something in that particular layer at that particular time. The background layer for example contains a filled keyframe black circle in the first frame. The photo1 layer also contains a filled keyframe in its first frame. Both layers contain photos. The photo2 layer however contains an empty keyframe in the first frame indicating that it is currently empty. You ll insert a keyframe in the photo2 layer at the point in time when you want the next photo to appear. 1 Select frame 24 on the photo2 layer. As you select a frame Flash displays the frame number beneath the Timeline. 2 Choose Insert Timeline Keyframe F6 . A new keyframe indicated by an empty circle appears in the photo2 layer in frame 24. 3 Select the new keyframe at frame 24 in the photo2 layer. 4 Drag the item from your library onto the Stage. The empty circle at frame 24 becomes filled indicating there is now a change in the photo2 layer. At frame 24 your photo appears on the Stage. You can click and drag the red playhead from the top of the Timeline to scrub or show what s happening on the Stage at any point along the Timeline. You ll see that the background photo and photo1 remain on the Stage throughout the Timeline but photo2 appears only at frame 24. ADOBE FLASH PROFESSIONAL CS5 CLASSROOM IN A BOOK 21 Download from Library of Wow ebook Understanding frames and keyframes is essential for mastering Flash. Be sure you understand how the photo2 layer contains 48 frames with 2 keyframes an empty keyframe at frame 1 and a filled keyframe at frame 24. Moving a keyframe If you want your to appear later or earlier you need to move the keyframe in which it appears later or earlier along the Timeline. You can easily move any keyframe .