Like title says... say I'm making a new theme. When I finish an item, save, etc... I decide I'd like to return, at least to a Cake theme, the item I had altered. How's is that done? IOW, I guess I need to find the Cake item I want to replace on my theme.
Specifically, I had worked on the meters... decided I liked the Mercury meters better than what I came up and wanted to return to the "Mercury" meter as a starting point.