How do you change the font/size when you are composing email?

I know the toolbar, I want to change the font to stay automatically so I don't have to change it over and over. I have looked everywhere and went to Yahoo Help.How do you change the font/size when you are composing email?
Sorry that you have to change it every time you send an email. Unfortunately that is all you can do since it is unlike Outlook and Outlook express where you can find the font you can see well and save it for the emails you send out. Plus you can try on your browser to select view, then chose large so you can at least see everything on the web. I have bad vision so this is what I learned to do hope I helped you out.