One clue is finding where earthquakes originated and that is where the transform boundary is another clue is offsetting since sometimes the action of s transform fault will form a small valleys long the line of movement.if a feature like a creek or highway crosses a transform fault, the movement of the fault will break or offset the feature. When seen from above the feature will appear to make a zigzag. I had this for hw and could not find a third clue It really annoyed me and still does