Stack turned into 'Template'

Since, I am guessing, Stacks 3, some stacks turned into ‘Templates’ which are effectively just functionless frames. The Inspector appears to show all the inoperative parameters but doesn’t say what the Stack actually is called. How can I identify the stack? (I have quite a few and do not remember what they all do - the one I am thinking of here is one that animates an image in as you scroll to it.)