This extension adds a command that will take a selected symbol instance, create a new duplicate in the library, and swap the selected symbol for the newly created duplicate.

I use this command when I want to make a symbol that’s very similar to one that I’ve already got on stage. So if I have a button on stage with text inside it and I want another one exactly like it but with different text, I drag a copy using the opt key (alt on Windows), then I run this command. The command prompts me for a new name, I type it, hit OK, and now I’ve got a duplicated symbol that I can go in and edit without affecting the original.

I’ve also added a feature to replace the name if it contains the name of the original symbol. So, say your original symbol is called back and your original instance is called back_mc, if you name your new symbol next it will update the name of the new instance to next_mc. Otherwise, the original instance name (or lack thereof) will be kept.

UPDATE (9/21/09): DaveW correctly pointed out on the CHF forum that this command largely duplicates functionality that is built into Flash with right-click > Duplicate Symbol. It doesn’t do anything with the instance name, but that’s not a huge difference. In the future I may add something to make this extension more unique, if I find it’s helpful. Feel free to post ideas in the comments section.

Download
(compatibility: Flash MX 2004 and up)
Swap Instance for Duplicate Symbol.mxp