Oke well let's take a look at one of the more classic chronograph layouts then:
With a Rolex Daytona, do note most chronographs of different brands/models all have their little quirks.
We have a main dial, with three little sub-dials in a 9-6-3 configuration (just think of the hours they are closest too.
On the side we have the triplock crown (for setting the time) between the two pushers, the top pusher is for starting/stopping the chronograph, the bottom pusher is for returning the chronograph hand and totalisers to zero. A Rolex uses screw down pushers that you can lock and unlock.
In the centre we find the conventional hour hand and minute hand for normal time keeping. And the chronograph's second hand that keeps track of the seconds.
Below that we have the sub-dial at 6 o'clock, that is the conventional seconds indicator.
On the right side of the dial near the 3 o'clock position we have the chronograph minute totalizer.
If a timing sequence takes more than 30min the half hour will be recorded by the hour dial, and the minute dial will do another revolution.
Then on the left side of the dial near the 9 o'clock position we have the chronograph hour totaliser that keeps track of the hours in half an hour segments.
Then the Rolex has one more addition quite commonly found and that is the the calibrated tachyometer bezel for the easy reading of speed. Which is very easy: you measure the time it takes for a car to go a predetermined distance of 1 km or 1 mph with the chronograph.
And wherever the chronograph's secondhand points at the bezel, that is the speed in mph or kph.