Watch face in running mode

I think you mean the running app. You can configure data screens for it in the watch settings (Activities & Apps - Run - Run Settings - Data Screens). You can select to have only one data screen with heart rate, distance and time.

Great! Thanks a mill 

ovekvam said:

You can select to have only one data screen with heart rate, distance and time.

Sure, you are right, you can configure data screens.

But what I don’t get here: The standard (starting/first) data screen for running has time, distance, pace and pulse - at least on my FR255.
5340302 What are you missing here? It has all the values you want, without switching screens.

I only had pulse on one screen, distance/round time/speed, round and actual time (clock) on the third screen. But managed to set up a 4th screen from your instructions. 

You can delete all your one field screens and get all your data on the same first screen (6 data fields) . Please read manual 

Or use some external data fields like Dozen Run