How to Start: The timer defaults to -01:00. Hit "Start" when your in-game clock matches this time (or set it manually).
Pre-Game: To set a negative time (e.g., -01:30), enter the time, check the "Pre-Game" box, then click "Set Time".
Syncing Late: Enter the current match time (e.g., "12:00") and click "Set Time" to sync up instantly.
Audio Cues: Reminders play 10 seconds early (except Bounties/Tormentor). Stack reminder plays at xx:45.