Hold your finger on the display (any of the list items) for 3-4 seconds and you get a new window where you can scroll through the choices of 5, 6, or 8 minutes depending on the tournament director's preference -- simply drag your finger up or down in the window which has the time numbers.
The list includes a 15 second warning, 1 minute time-out, 2 minutes between games, 5/6/8 minutes to start a match, 10 minutes for a new match for those who prefer that approach, and 15 minutes for a medical time-out.
The time interval from match called to start of play can be set to 5, 6, or 8 minutes based on the tournament director's preference.
The referee can tap the "Stop" button at any time to indicate an early end of the time interval and return to the list of available intervals.
Tap on any of the listed time intervals and it will start a count-down timer for the duration of that event.