How can I change font for e-mail?

The font is so small I can hardly read it. I need to make it larger.How can I change font for e-mail?
sign in to email.......on top right side of the page click on %26lt;options%26gt; then find there %26lt;general preferences%26gt; and change your fonts....colors etc....then save and back to the page again. thats all.How can I change font for e-mail?
there are a couple of ways of doing it, depending what email service your using? yahoo, I'm guessing?



when your writing your email, at the top it should have things like 8, 9, 10? i dunno, whatever your size is, click that and click the size you want.