How do I set my daily suggestions to train by heart rate rather than pace. My built workouts are train by heart rate. My 745 had train by heart rate. I have the 6s pro. Having problems with it playing Spotify through my jaybirds also.

Training by heart rate has proven to be more accurate for me. I can't figure out how to set my watch to give daily suggestions in heart rate instead of pace........ I figured the heart rate thing out. Anyone else had problems with Spotify? Worked seamlessly with my 745 kind of disappointed. Says it's connected watch says it's playing but can't hear anything on my jaybirds tried over and over to forget and repair. Re download my music! Hellppp.