A method (900, 1000, 1200, 1300) of controlling the operation of a head-up display apparatus (302), a control apparatus (801), a system (302), a vehicle (101), a computer program (804) and a non-transitory computer readable medium (806) is disclosed. The method (900, 1000, 1200, 1300) comprises: obtaining first directional data indicative of a path of a vehicle (101, 101A, 101B); and adjusting the position of a graphical element (106) presented by the head-up display apparatus (302) in dependence on the first directional data.