What does coarse mean in FM synthesis?

Tried googling and couldn't find a clear answer. What does it mean/do?

Also, where do I find how to adjust coarse on FM8?

Thanks!

Submitted April 14, 2018 at 02:29PM by Dibby_Dibs https://www.reddit.com/r/edmproduction/comments/8c90kc/what_does_coarse_mean_in_fm_synthesis/?utm_source=ifttt