How to show the timing refresh after a new autolap ?

Hi there,

I have set my running Autolap to 400m.

I used 4 data fields screen on the Fenix5. How do I set one of the Data Fields to refresh (ie re-start the timer) everytime I complete one round of 400m on the track ?

This is so that I can see my timing & how I am doing at every round, ie to see am I faster or slower in the midst of each round.

Any tips ?

Thanks