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Add a numbered or bulleted list to a message - Outlook - Office.com
Bullet or number lists make it easier to read lists in your email message. You can apply lists to existing text or create new lists.
Change the message format to HTML, Rich Text Format, or plain text - Outlook - Office.com
Switch the format of email messages, which controls formatting options that are available such as colors, fonts, and tables.
Change the size or formatting of text - Outlook - Office.com
Apply a format to selected text or a theme the entire message to give it a professional and modern look.