Changing demo content

Newbie question: Is there a quick way to find out where the items on the front page demo are located in the admin? For instance, I can find the K2 article for "Rolling Stones on North American Tour", but how do I find how to change the photo on the front and the text that goes over it? Same for the News And Features text that is just below the four images on the front.

As You are new to Joomla as I see, I would suggest You to read some beginners books about it. But if it's not a matter, then most things You are searching for can be found inside articles, k2 items and modules.