1. Click the "Start" button or press "A" on the keyboard to start the stopwatch.
2. During stopwatch timing, click the "Stop" button or press "A" on the keyboard to stop the stopwatch.
3. During stopwatch timing, click the "Split" button or press "S" on the keyboard to record a lap.
4. Click the "Reset" button or press "C" on the keyboard to clear all records.