newbie question

currently my Favorite button has the default programming which is 'Jump (MainR)'

is there anything special about Favorite or lights button. I recall reading somewhere that clicking it a 2nd time will take it back to prev page, but clicking it everytime has the same result.

I have already implemented a 'current activity' button and i can program the favorite button to use it if already on the fav page, but wondering if there is anything out of the box.

thanks.