How about a HELP button?!!
I have no idea how to get any help from Yahoo. Had to click on settings and "give feedback", then get redirected to confusing page, and all I want to know is how to permanently set my font to a medium size.
Every time I compose a new e-mail I have to click on the font button and change it from small to medium. No way of permanently setting my font preferences.
Or maybe there is, but I can't see it, and since it's impossible to just ask Yahoo a simple question, I'm now writing this on some weird forum page, having no idea what the **** is really going on or if anyone is going to respond to this.
Maybe I should just open a Gmail account like everyone else.

If you still find that the issue is happening, please see this help page for troubleshooting:
https://help.yahoo.com/kb/new-mail/fix-problems-mail-sln28075.html?impressions=true
If you need more help, reach out to us through our Help pages or Forums:
https://help.yahoo.com
https://forums.yahoo.net
Thank you!
Mail Support