If you’re attempting to format an email that is set as plain text, the Mail app will ask if you want to convert the plain text email to rich text. Using mail formatting options will require the message to be sent as rich text, so if you’re using plain text for emails you would need to convert the email message to rich text. You can also select specific text or characters and stylize those independently from other text in the email window. You can stylize and format the appearance of an entire email by adjusting the settings right away, or you can stylize and format email appearances by manually choosing the format options as you compose an email. Many of these email format options also include associated keyboard shortcuts too, like command+B for bold and command+I for italics. The Mac Mail format bar options are significant, looking from left to right at the format bar and using those tools can allow you to change the format, style, and appearance of emails with the following formatting options: Stylize and format your email as desired and send it as usual.The email formatting panel will appear at the top of the email composition window.Look at the top of the mail composition window and click the button.
Open any email compose window, either a new email composition, a reply, or forward.
How to Format Emails on Mac with the Mail Format Bar The Mail Format bar will give you controls to change and set email font family, font size, font colors, bold, italic, underline, strikethrough, align left, align center, align right, insert bulleted and numbered lists, indent and outdent, and more.