I found a resource that describes how to change the default fonts on outgoing emails, but this seems to only apply to the "emails" module.

When composing an email from a lead or contact record (by clicking "send email"), the default font is still set as Verdana (even though I changed the default font to Arial by following these instructions:  https://www.zoho.com/mail/help/compose.html#alink3)

Can someone explain how to change the default font in the contacts email composer?