The Timeline inspector represents the properties of layers and images over time Choose Window > Timeline to open the Timeline inspector. See also Timeline overview.

Right-click (Windows) or Control-click (Macintosh) the Timeline inspector to open a shortcut menu that includes all of the relevant commands.

Playback head shows which frame of the timeline is currently displayed on the page.

Animation bars show the duration of each object. 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.

Timeline pop-up menu selects which of the document's timelines are displayed the Timeline inspector.

Animation channels are the channels displaying bars for animating layers and images.

Behavior channel is the channel for behaviors that should be executed at a particular frame in the timeline.

Frame numbers indicate the number of frames each bar occupies. The number between the Back and Play button is 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.

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 backwards.

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 page loads.

Loop makes the current timeline loop indefinitely while the page is open in a browser. Loop attaches a behavior to the page's BODY tag that executes the Loop Timeline action when the page loads. You can edit the parameters for this behavior to define the number of loops.