missing Heart Rate Gauge on Garmin 645

If it's anything like the 935, HR Gauge is a separate data *page* not a field. Unfortunately, I don't think this is in the manual for either the 935 or 645.

On my 935, I would add it to an activity as follows:

1) Open the activity (e.g. Run)

2) Hold UP for the menu

3) Select [Activity] Settings (e.g. Run Settings)

4) Select Data Screens

5) Scroll UP or DOWN until I reach the page that says "+ Add New"

6) Select HR Gauge

thanks for the respons Will.  Followed those steps....not present. Watched a video where it was a data field under Heart Rate Fields on a 235.  Seems to be missing.  Love that screen too.

Ah that's too bad. Sorry, I assumed 645 would have that page.

Not exactly the same thing, but you could try this Connect IQ app if you have a spare slot:

[https://apps.garmin.com/en-US/apps/4885b1e1-7102-4c66-8600-c69f911780d6#0]

(this was the most popular one I could find)

Thanks Will, I have been using the data field called RunningDF41.  If you put it in the top field it give you the same effect but uses up one of the 2 ConnectIQ Data Fields you are allowed to use per activity on the 645.  I will give yours a try too.