Use lists to show steps, action items, or key takeaways in your message. You can start with a new bulleted or numbered list, or you can convert existing paragraphs into a list.
Create a list from existing text
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Select the paragraphs you want to change into a list.
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On the ribbon, select the Message tab.
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In the Basic Text section, select
 Bullets or Numbering to apply that formatting.Tip: To apply a particular bullet or numbering style, select the down arrow next to Bullets
 or Numbering , then select the style you prefer. 
Create a new list
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Put the cursor in an empty paragraph where you want to start your list.
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On the ribbon, select the Message tab.
 - 
              
In the Basic Text section, select
 Bullets or Numbering to apply that formatting.Tip: To apply a particular bullet or numbering style, select the down arrow next to Bullets
 or Numbering , then select the style you prefer. - 
              
When the list is complete, put the cursor at the end of the last list item, then press Enter twice. This action starts a new Normal paragraph without list formatting.