Flash-Tutorials - Using the Libraries - Symbol Management
You already know how to add new symbols to the library, edit them and change their behavior. Now let us talk about other actions that you can perform with symbols. You can change the name of the symbol even if there are instances of it created in the Flash document. To do this, double-click the name of the symbol in the symbols list. You can also use the Rename option in the menus of the Libraries window. After any of these actions, the blank text field will appear instead of the symbol name. Type new symbol name in it and press enter to save the changes or escape to cancel the action.
You can also change the name of the symbol using the Symbol Properties dialog box that can be brought up selecting Properties in the context menu or menu of the Library window. In this dialog box, you can also select the symbol behavior. Flash will automatically adjust all of the instances of the symbol to work with the new symbol name.
To correct the symbol created in Flash you need to double-click the icon beside the image name. You can also select Edit in the menu of the Library window. If you will bring up the Symbol Properties box, it will also have the Edit button that will allow you edit the symbol.
Sometimes there is no editing software set for the symbol by default. Then you must select Edit With option to bring the dialog box to browse for the needed program and then click Open after it is selected.
To delete the symbol, sect it and then click Delete in the library context menu or click the delete button in the button of the Library window. Flash will ask for confirmation as the symbol, all of its instances will be deleted, and it will be impossible to restore them. If you want to delete the symbol with all of its instances, check the Delete Symbol Instances option, otherwise you can change them to the instances of the other image. Once you made needed selections click Delete or Cancel if you changed your mind.
Flash has the convenient option that allows you select symbols that have no instances in the flash document (unused symbols). To do so, click Select Unused Items in the Library window menu. You can delete all of these items to clear up the space as they are not used anywhere.
When you want to place the symbol with other one, you can either choose Don't Replace Existing Items to keep both symbols (the initial symbol will have "copy" added to its name then) or select Replace Existing Items (Not Undoable) to replace the old symbol with new one. The second action is impossible to undo as you have probably figured out.