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 and right-click (Windows) or Control-click (Macintosh), and select Edit.

    • Double-click the symbol in the Library.

  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.

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