Set up heading numbering as discussed at http://shaunakelly.com/word/numberin...g20072010.html. Then create body text paragraph styles, which you may call "Item 1," "Item 2," etc. (corresponding to your example). Make sure that "Item 1" is based on Heading 1, that "Item 2" is based on Heading 2, etc. For the "child" styles, change any settings that should be different from those of the parent heading styles. Numbering will be inherited.

__________________
Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional

To clarify, my advice is based on WinWord; I'm not sure if it works exactly the same in MacWord.

__________________
Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional