Why Hi Fellas... there are plenty of women here
I have never been able to change just one part of the layer style and it is annoying. I don't think you are missing anything...
Thanks Melissa, and I stand corrected
Try Shift + Alt + Drag and drag it onto the one you want to replace (works here on Windows I don't know about Mac)
Thank you Dave! YES! I thought I had exhausted all the shortcuts but apparently I did not hold Shift+Alt before starting to drag on top of another layer style. so yes, drag-replace on layer styles works great. I see smart filters do not exhibit the same behavior exactly, and the shortcut is Ctrl+Alt+Drag to replace same existing filter.
so problem solved for both scenarios! information is here for all the community to see. great job Ladies and Gentlemen.