changed composing font settings won't work

I had originally set my default font for new emails to be bold. That worked fine, but now that I’ve decided to change it back to regular, the change is not happening in the program, even after exiting and starting again. I don’t have a setting for bold font in my template or in the settings menu. Suggestions?

Hi, do you use HTML or plaintext? And are you talking about new emails or old ones which you are trying to read?