Q: How does the top inner dial on the chronograph work?

The inner top dial on the chronograph watch face is the minutes elapsed when using the stopwatch on the face.

As for seeing all of the lap times, I do not believe this is possible. When starting a new lap, the bottom time will show you the difference (green being less than, red being more), then switches to the current lap time. If you want to see all of your lap times during a stopwatch use, use the stopwatch app and pick a view mode that will tell you the history, such as digital, graph, or hybrid. This can be changed by pressing the display while in the app.

Hope this helps!