Create a modified copy of a monster

I would like to be able to drag-and-drop a monster into my map, but I'd like to modify the monsters character sheet to add spells, change attacks, etc. However, modifications to a monster character sheet propagate to all new monster instances. How do I create a unique copy of a monster to modify its stats?  Thanks!

You can just duplicate the character, then modify the copy of the monster as desired.

Thanks Gozer. I wasn't quite sure how to do that, but you're advice gave me the hint I needed to figure this out. Anyway, for others that need to do this: * Drag the monster you want to modify onto the VT, which adds the monster sheet to your journal.  * Click the monster name in your journal to bring up the monster info window.  * Click "Edit" button * In the Edit window, click on the "Duplicate" button, which puts a copy of the monster into your journal. * Edit the copy as needed.