I am not sure what it is technically called. It is on the dark gray admin bar to pop you right back to the top after you click on it. The Reader is where I most often needed it after scrolling through the many posts. Now that it is the blue admin bar on that page, the little arrow is gone. Could you please insert that on the blue bar? That really was handy.
The blog I need help with is thebirdingbunch.com.