Edit movie clip symbols with 9-slice scaling – Adobe Flash Professional CC 2014 v.13.0 User Manual
Page 306
A 9-slice-enabled movie clip can contain nested objects within it, but only certain types of objects inside the movie clip properly scale in the 9-slice
manner. To make a movie clip with internal objects that also adhere to 9-slice scaling when the movie clip is scaled, those nested objects must be
shapes, drawing objects, groups, or graphic symbols.
A 9-slice-enabled symbol in the Library panel and scaled on the Stage
For video tutorials about 9-slice scaling, see:
Edit movie clip symbols with 9-slice scaling
By default, slice guides are placed at 25% (or one-fourth) of the symbol’s width and height from the edge of the symbol. In symbol-editing mode,
the slice guides appear as dotted lines superimposed on the symbol. The slice guides don’t snap when you drag them on the pasteboard. The
guides do not appear when the symbol is on the Stage.
You cannot edit 9-slice-enabled symbols in place on the Stage. You must edit them in symbol-editing mode.
Note: Instances made from a 9-slice-enabled movie clip symbol can be transformed, but should not be edited. Editing these instances can have
unpredictable results.
For video tutorials about 9-slice scaling, see:
Enable 9-slice scaling for an existing movie clip symbol
1. With the source document open, select Window > Library.
2. Select a movie clip, button, or graphic symbol in the Library panel.
3. Select Properties from the Library Panel menu.
4. Select Enable Guides for 9-slice Scaling.
Edit a 9-slice-enabled movie clip symbol
1. Enter symbol-editing mode by doing one of the following:
Select an instance of the symbol on the Stage and right-click (Windows) or Control-click (Macintosh), and select Edit.
Select the symbol in the Library panel and right-click (Windows) or Control-click (Macintosh), and select Edit.
Double-click the symbol in the Library panel.
2. To move the horizontal or vertical guides, drag and release a guide. The new position of the guide is updated in the Library preview for the
symbol.
Improving rendering performance with bitmap caching
Runtime bitmap caching lets you optimize playback performance by specifying that a static movie clip (for example, a background image) or button
symbol be cached as a bitmap at runtime. By default, Flash Player redraws each vector item on the Stage in every frame. Caching a movie clip or
button symbol as a bitmap prevents Flash Player from having to continually redraw the item, because the image is a bitmap and its position on the
299