To exchange a symbol instance’s definition with another:
1. Select the existing symbol.
2. In the Object Info palette, click the Replace button.
Alternatively, right-click (Windows) or Ctrl-click (Mac) on a symbol, and select Replace from the context menu.
The Choose a Symbol dialog box opens.
3. Select the desired new symbol.
Only the symbols that are currently part of the active drawing are listed.
4. Click OK.
The old symbol instance is replaced with the new symbol instance.
The new symbol uses the settings from the replaced symbol. Future occurrences of the new symbol are unaffected by these settings.
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