Using a chronograph watch is easy and is similar whether you’re using an analog or digital types. There are 2 different buttons (or pushers, as it’s called in horology) that are normally positioned on the right side of the watch, at 2 and 4 o’clock positions.
Normally, the top pusher is used to control the chronograph. A single push will start the chronograph and you can see the seconds hand starting to move to record time. Pushing this pusher again will pause it, and you can resume the time by pushing it again.
The bottom pusher is used to reset the chronograph. So say you’ve started the time and pause it, you can reset it all back to zero by pushing the bottom pusher.
Now, this is the basic and most common way on how to use a chronograph watch. Certain higher end chronographs will have more functions (more on that later on), and hence it will be more complicated to use it. If in doubt, I highly recommend reading the user manual for your particular chronograph watch so that you will fully understand how to operate it and get the best out of it.