How do I permanently add font, size and color to my e-mail?

I have searched the tutorials and have not found the answer. At this time I have to change font, size and color each time I send an e-mail

Any help? ThanksHow do I permanently add font, size and color to my e-mail?
If you have the new yahoo (not the classic one) go to options under the search bar and click on mail options. Then under general there is font and font size. when you write a new mail message the color you change it to stays the same until you change it again.