MACROMEDIA 38028779 - Macromedia Dreamweaver - Mac, Using Manual, Page: 426 / 582

Chapter 17 426
Playback head
shows which frame of the timeline is currently displayed on the page.
Timeline pop-up menu
specifies which of the document’s timelines is currently
displayed in the Timelines panel.
Animation channels
display bars for animating layers 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.
Keyframes
are 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
is the channel for behaviors that should be executed at a
particular frame in the timeline.
Frame numbers
indicate the sequential numbering of frames. The number between
the Back and Play buttons is that of the current frame. 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.
Faster rates may not improve performance. Browsers always play every frame of the
animation, even if they cannot attain the specified frame rate on the user’s system.
The frame rate is ignored if it is higher than the browser can manage.
Playback options
Listed below 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 continuously.
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 marker in this
frame to edit the parameters for this behavior and change the number of loops.