MACROMEDIA STUDIO 8-EXPLORING STUDIO 8 Manual page 63

The Timeline status display at the bottom of the Timeline indicates the
selected frame number, the current frame rate, and the elapsed time to the
current frame.
When an animation is played, the actual frame rate is displayed; this may
differ from the document's frame rate setting if the computer can't
calculate and display the animation quickly enough.
Guide layer icon
Center Frame button
Onion-skinning buttons
You can change the way frames are displayed in the Timeline, as well as
display thumbnails of frame content in the Timeline. The Timeline shows
where there is animation in a document, including frame-by-frame
animation, tweened animation, and motion paths. For more information
on animation, see "Creating Motion" in Using Flash.
Controls in the layers section of the Timeline let you hide, show, lock, or
unlock layers, as well as display layer contents as outlines. For more
information, see "Editing layers and layer folders" on page
You can insert, delete, select, and move frames in the Timeline. You can
also drag frames to a new location on the same layer or to a different layer.
For more information, see
on page 66.
Changing the appearance of the Timeline
By default, the Timeline appears at the top of the main application
window, above the Stage. To change its position, you can dock the
Timeline to the bottom or either side of the main application window, or
display the Timeline as its own window. You can also hide the Timeline.
Empty keyframe
Playhead Timeline header
Frame Rate indicator
Current Frame indicator
"Working with frames in the Timeline"
Elapsed Time indicator
72.
Frame View pop-up menu
Frame-by-frame animation
Tweened animation
Flash basics 63