Adobe Dreamweaver CS3 Manuale Utente Scaricare il pdf (Pagina 174)

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DREAMWEAVER CS3

User Guide

167

A. Keyframes B. Timelines pop-up menu C. Frame numbers D. Behaviors channel E. Animation channel F. Animation bars G. Playback

head

Keyframes Define frames in a bar where you have specified properties (such as position) for the object.

Dreamweaver calculates intermediate values for frames in between keyframes. Small circles mark keyframes.

Behaviors channel Shows the behaviors that should be executed at a particular frame in the timeline.

Timelines pop-up menu Specifies which of the document’s timelines is currently displayed in the Timelines panel.

Animation channel Displays bars for animating AP elements and images.

Animation bars Show the duration of each object’s animation. A single row can include multiple bars representing

different objects. Different bars cannot control the same object in the same frame.

Playback head Shows which frame of the timeline is currently displayed in the Document window.

Frame numbers Indicate the sequential numbering of frames. The number between the Back and Play buttons is the

current frame number. You control the duration of animation by setting the total number of frames and the number

of frames per second (fps). The default setting of 15 frames per second is a good average rate to use for most browsers

running on common Windows and Macintosh systems.

Note: Faster rates may not improve performance. Browsers always play every frame of the animation, even if they cannot

attain the specified frame rate. The frame rate is ignored if it is higher than the browser can manage.

Context menu Contains various timeline-related commands.

Playback options

The following are the playback options for viewing the animation.

Rewind Moves the playback head to the first frame in the timeline.

Back Moves the playback head one frame to the left. Click Back and hold down the mouse button to play the timeline

backward.

Play Moves the playback head one frame to the right. Click Play and hold down the mouse button to play the

timeline forward.

Autoplay Makes a timeline begin playing automatically when the current page loads in a browser. Autoplay attaches

a behavior to the page’s body tag that executes the Play Timeline action when the page loads.

Loop Makes the current timeline loop indefinitely while the page is open in a browser. Loop inserts the Go to

Timeline Frame behavior in the Behaviors channel after the last frame of the animation. Double-click the behavior’s

marker in the Behaviors channel to edit the parameters for this behavior and change the number of loops.

September 4, 2007

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Adobe Dreamweaver CS3 Manuale Utente Pagina 174

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