 The latter, formerly known as touch judges, had the primary function of indicating when the ball had gone into "touch"; their role has been expanded and they are now expected to assist the referee in a number of areas, such as watching for foul play and checking offside lines.In addition, for matches in high level competitions, there is often a television match official (TMO; popularly called the "video referee"), to assist with certain decisions, linked up to the referee by radio.The referees have a system of hand signals to indicate their decisions.