266 Creating Motion
■ To convert a keyframe to a frame, select the keyframe and select Modify > Timeline >
Clear Keyframe, or right-click (Windows) or Control-click (Macintosh) the keyframe and
select Clear Keyframe from the context menu. The cleared keyframe and all frames up to
the subsequent keyframe are replaced with the contents of the frame preceding the
cleared keyframe.
■ To change the length of a tweened sequence, drag the beginning or ending keyframe left
or right. To change the length of a frame-by-frame sequence, see “Creating frame-by-
frame animations” on page 264.
■ To add a library item to the current keyframe, drag the item from the Library panel
onto the Stage.
■ To reverse an animation sequence, select the appropriate frames in one or more layers and
select Modify > Timeline > Reverse Frames. There must be keyframes at the beginning
and end of the sequence.
Using onion skinning
Normally, Flash displays one frame of the animation sequence at a time on the Stage. To help
you position and edit a frame-by-frame animation, you can view two or more frames on the
Stage at once. The frame under the playhead appears in full color, while surrounding frames
are dimmed, making it appear as if each frame were drawn on a sheet of translucent onion-
skin paper and the sheets were stacked on top of each other. Dimmed frames cannot be
edited.
To simultaneously see several frames of an animation on the Stage:
■ Click the Onion Skin button. All frames between the Start Onion Skin and End Onion
Skin markers (in the Timeline header) are superimposed as one frame in the Document
window.
To control onion skinning display, do any of the following:
■ To display onion skinned frames as outlines, click the Onion Skin Outlines button.
■ To change the position of either onion skin marker, drag its pointer to a new location.
(Normally, the onion skin markers move in conjunction with the current frame pointer.)
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