Golf etiquette on the green?

In golf, if you are playing as a foursome, how do you know if it is your turn on the green? I need this for a project, so the first one with the right answer gets the BEST ANSWER honor.

The player who is furthest away from the hole, no matter what surface they are on, always has the "honor:, meaning that it’s their turn. When putting, after a player attempts his first putt, he can choose to finish, or remark his ball and wait for his next turn. In fourball match play, if it is your turn to go, you can have your partner putt his ball (it’s your teams turn), even if he is the closest person to the hole.
Usually, if you have putted your first, and you would have to stand in the line of your partner or opponent in order to finish, it’s always good etiquette to mark your ball, and let them go before you finish.