Technically, any pin you do is a pin of a webpage. You simply choose which image from that webpage to use as the actual pin...so when you click on your pin, it will take you back to that webpage.
Did you get the "Pin it" button on your toolbar? That is what I use and it's quick and easy!
Thanks for your help. I finally installed the "Pin It" button on Pinterest. It's great.
BTW, I searched a cool extension, "just pin it" on Chrome Web Store. it could edit images before pin on Pinterest.