Name: OneRunData - One screen is all you need
Rating: 4.6 (97 reviews)
Author: DGAZ72

This Data field was born from a runners need. As I found it very useful I am sharing it.

Switching screens during your run? 
No more.
A single data field for running , including all you need for your run.

Highlights: Race Mode, Heart rate gauge, Time in zones, Running performance Index (recorded), Smoothed pace, Average pace, Distance, Time, GPS, Time of day

Installation- add the data field to your running app (note this is a data field, install accordingly- see bottom of page here). Note this is a single field layout.
The Data field is adjusted to your measurements units and your background settings.

Features:
1. Color coded Heart rate zone gauge (Garmin std colors).
Zones are taken from your running profile. (NOTE: in F5/5S watches currently Garmin has a HR Zone sync problem. Please manually set on watch to prevent crashes)
2 .Heart Rate in BPM, %HR max or % Heart Rate Residue. Change through Settings in Garmin connect . HR average is shown to the left of HR.
3. RPI - Running Performance Index, Shown initially as "--" on the right of the heart rate, is a formula based on Pace, Heart rate and distance that calculates automatically as the run progresses . First values will show after 10 minutes of running. The values should be between 30-70 at the end of a run and are a very good indicator for your performance comparison between different runs. RPI is also saved in your run summary in connect as a graph showing RPI through the whole run.
you can read more here:
http://www.runnersworld.com/sweat-science/tracking-fitness-with-the-heart-rate-running-speed-index
https://www.trainingpeaks.com/blog/the-best-way-to-monitor-your-run-training-daily/
http://fellrnr.com/wiki/Running_Economy
4. Pace - Is a 12 seconds moving window average of GPS pace (can be configured also as speed in Mobile connect settings) 
5. Average Pace - Is the average accumulated run pace (or speed) calculate while the app is not stopped. Change through Settings in Garmin connect Mobile
    - A.Pace- Whole Run average
    - L.Pace - Pace since beginning of lap (If you stop and start an avg pace activity in the first 5 seconds it will change to L.Pace)
    - Race mode -when you pass a KM/Mile marker and see that the distance is not correct , click the lap button. distance will round accordingly and pace re calculated. A purple line will now appear below the distance field denoting the distance is now adjusted. if you feel something is not right press the lap button again within 20 seconds and the distance/pace will revert to GPS distance un-adjusted. (of course this can be done at any time by clicking lap and again lap within 20 second). Note:although tested live , my suggestion is to use before a race at least once to get used to it.

6. Distance - in KM/Miles based on your device settings
7. Timer - Duration of run (hours will show up in small characters when relevant).
8. Time of day/GPS Quality - Shown on the bottom of the screen (this will show only on round screen)
     -Green- GPS good
     -Red- GPS not usable
9. HR zone graph - The graph will show in the middle of the screen with the time in percentage from overall time. Color coding for zones as the gauge is applied.(note : in 630/235/735 will also have the current heart rate pointer on this graph).In addition the current zone color will show up on the top of the screen for easier visibility during a run.

Hope you enjoy.

Support:
please post comments, bugs, requests  and questions in this link not in reviews:
https://forums.garmin.com/showthread.php?374385-Data-Field-OneDataRun

Install a data field:
Long press UP-Settings-Apps-Running-Data Screens-desired Screen 1..10 -layout- single-Field-Select "ConnectIQ Fields" -RunDataField =Done configuration.

In case of an error while using - uninstall the data field , restart the watch, re-install. in most cases this will solve the issue.