How to use the stopwatch function on the Redmi Watch 4?

For your reference, here are some details about how to use the stopwatch function on the Redmi Watch 4:
1. Open the Stopwatch APP in the APP list;
2. Tap [Start timing] >> tap the [Dot] button or tap the shortcut key during timing to generate dot data. In the dot record display area, you can slide the screen up and down to view all dot records, and a maximum of 50 dot records can be displayed;
3. Tap the [Zero] button to clear the stopwatch data.
Note:
Stopwatch APP does not support background running, exiting stopwatch will clear all timing data.