To turn formatting marks on or off, do the following:
When you turn formatting marks on or off, your choice remains in effect for all subsequent messages you compose, reply to, or forward. Formatting marks assist with text layout. These are actually formatting marks, such as dots (for spaces) or arrows (for tab characters) in Outlook. When composing an email message, you might see some symbols within your text. Outlook for Microsoft 365 Outlook 2021 Outlook 2019 Outlook 2016 Outlook 2013 Outlook 2010 Outlook 2007 More.
