Umpire Signals

The standardised signals — four, six, bye, leg-bye, wide, no-ball, out, dead ball and third-umpire referral — used to communicate decisions to players and scorers (defined in Law 2.13 of the Laws of Cricket).

Neutral umpires became standard in the 1990s; the Decision Review System (DRS) was introduced in Test cricket in 2008 and refined with ball-tracking and UltraEdge.

Each signal is performed clearly to the scorers, then acknowledged with a wave from the scoring box.