How to set suggested workout target from BPM to Watts?

On my Fenix 7S Pro, I can set the workout target to either BPM or Watts but I can't find a similar setting on my Edge 840. It's currently in BPM, which is fine for outside rides as I don't have pedals that monitor power but inside, connected to my trainer, I would prefer Watts. Can it be done?

Thanks.

0 SylvainGa 17 days ago

To follow up on my previous post, yesterday, after I've set my workout target from BMP to Watts in my watch, the suggested workout was automatically changed to Watts but the suggested workout on my Edge was still using BPM. Today, the new suggested workout was now in Watts. So it looks like their is a latency on the Edge side.