No, you may only mark your ball when it is on the green.
its not how you mark your ball, its how you mark your titleist.
any marking is legal i.e. dots, initials, names
You can only mark your ball and pick it up when you are on the green. However, if lift clean and place is in play you may pick it up, but that is usually only in the winter.
Play the ball as it lies, you are only allowed to mark and clean your ball when you are on the putting surface (green). You would receive a two shot penalty if you cleaned your ball.
no
he uses a coin
Golf ball markers come in various shapes and sizes. Under the rules of golf you can technically use anything to mark your golf ball on the green, you can use a tee, a pitch mark repairer or any coin. However good etiquette would be to use a small coin about 2-3 cm's in diameter and one that lies relatively flat to the ground as to not have any effect on your playing partners.
As long as the ball isn't in motion and it is on the green, you can mark its position and wait your turn to play.
They mark their ball out of courtesy for other players as if one player on the green hits the ball of another they receive a two shot penalty. It is also so the player can clean his ball and line it up.
When this happen, There is no relief from a ball embedded in a bunker.
a marker that is flat so a ball can roll over it