Software & Apps MS Office How to Highlight Text in Windows 10 Mail by Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated on February 03, 2020 pearleye / Getty Images MS Office Outlook Word Excel Powerpoint Tweet Share Email Mail is a Microsoft email app that's included in Windows Vista and later. Mail is a successor to Outlook Express and is a capable email client for basic functions such as sending and receiving email. The Windows 10 update for Mail brought additional features and functionality, such as more formatting options. For example, if you'd like to highlight text in an email you're sending to emphasize what you're saying, it's easy to use the Windows 10 Mail program's highlighter tool. Highlight Your Mail Text The instructions here apply to Windows 10 Mail. In Windows 10 Mail, compose a new email message. Select the text you'd like to highlight. From the Format tab, select the Highlight tool and the color you want to use. Your text is now highlighted.