![]() Please note that other Pearson websites and online products and services have their own separate privacy policies. This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about Adobe Press products and services that can be purchased through this site. All of these changes happen simultaneously when the playhead reaches a given frame, regardless of how few or how many layers there are. If frame 12 on Layer 3 is a blank keyframe, Flash will clear whatever was previously on that layer. If frame 12 on Layer 2 is a regular frame, Flash will continue to display whatever was in the previous keyframe in that layer. For example, if frame 12 on Layer 1 is a keyframe, Flash will replace whatever was previously on that layer with whatever is new in that keyframe. When the playhead reaches any given point in the Timeline-let's say it's frame 12-Flash looks at the entire column of cells and follows the instructions on each layer. Note also that there may be different things happening on different layers. If you insert a keyframe, skip a bunch of cells, and then insert another keyframe, Flash automatically fills the intervening cells with a series of regular frames. Note that you can't have empty cells in the middle of a movie. ![]() The intermediate frames don't contain white rectangles, but the dividing lines between the cells disappear the absence of dividing lines is what allows you to distinguish a series of frames from a series of empty cells. (Flash will assume that you want the series to begin in the cell immediately following the most recent keyframe.) When you choose Insert > Timeline > Frame or press F5, a white rectangle appears in the last cell in the series. To insert a series of frames, select the cell in which you want the series to end. To insert a frame into the Timeline, select the cell in which you want the frame to appear and choose Insert > Timeline > Frame, or press F5. When the playhead passes over a regular frame, it tells the Stage to continue displaying whatever was in the most recent keyframe. A frame (which we'll sometimes refer to as a regular frame, to distinguish it from a keyframe) signals to Flash that you want to maintain the status quo. A blank keyframe is represented in the Timeline by a white circle instead of a black one.įrame. ![]() You can make this happen by choosing Insert > Timeline > Blank Keyframe, or by pressing F7. On some occasions, you may want everything that was in the preceding keyframe to disappear. A small black circle appears in the cell. To insert a keyframe into the Timeline, select the cell in which you want the keyframe to appear and choose Insert > Timeline > Keyframe, or press F6. A keyframe can also mark changes that aren't visible on the Stage, such as the start or end of a sound. When the playhead passes over a keyframe, it updates the Stage to display whatever is new in that keyframe. A keyframe signals to Flash that you want something in your movie to change. The cells in the Timeline are empty by default, but you can fill them with either a keyframe or a regular frame. The content of each cell (or each column of cells, if the Timeline has more than one layer) determines what's happening on the Stage at the moment the playhead passes over it. The duration of that unit varies according to the frame rate-see #31-but it's usually somewhere between one-twelfth and one-thirtieth of a second. The Timeline is divided into cells, each of which represents a unit of time. The vertical red line that crosses the Timeline is called the playhead it marks the passage of time as it sweeps across the Timeline from left to right ( Figure 30).įigure 30 These are the features of the Timeline you'll use most often for animation. The Timeline is where you control how the objects on the Stage change over time. On occasion, you'll see those informal uses of the word in this book as well, when doing so makes instructions or explanations more readable. For example, a frame and a keyframe are technically different things, but people typically refer to both informally as "frames," as in "Go to the frame in which the balloon explodes." Similarly, a cell in the Timeline is technically not a frame unless there's something in it, but in everyday conversation, people call empty cells "frames" all the time, as in "Extend that sequence to frame 128." For that matter, you may even hear the Stage itself referred to as a frame, as in "Move that cloud out of the frame." Most of these usages come from the world of traditional film and animation, where they're perfectly acceptable. Most Flash developers don't use precise terminology in their day-to-day work.
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