When composing an email I choose the font type I like (Tahoma) but the next time I compose an email I must reset the font type again. How do I make my choice permanent until I change it again manually?
Assuming you are in the new email format, on the Inbox page click on the gear icon in the upper right corner of the screen, then on Settings. On the next page under Mail Settings, about halfway down the page, you will see the option to change the default font information. Make your changes and then sign out of the account and back in again. Hopefully, the changes you made will "stick".