Abstract: A method of marking the position of a golf ball on a putting green and assisting in aligning an ensuing putt of the golf ball. A marker is obtained. The marker comprises a thin object having a first major surface, a second major surface, and a peripheral edge. A segment of the object is pivotable relative to the balance of the object as between a first position in which the segment rests parallel with and within the same plane as the balance of the object and a second position in which the segment rests perpendicular to the balance of the object. The peripheral edge along the segment is conspicuously colored. The marker is placed proximate a golf ball on a putting green. The segment is pivoted from the first position to the second position. The marker is rotated as necessary to align the conspicuously colored edge of the segment resting in the second position with a predicted putting direction.