If the right paragraph style is applied to them then you only need to select them and press Ctrl-Q to reset the paragraph attributes.

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Andrew Lockton
Chrysalis Design, Melbourne Australia

Hi Andrew.
Thanks for your response.

It doesn't work on the Mac version.
When I bought the 2019 license I got the Microsoft Word 2010 Product Guide. Since I have been a power user of Word for more than 3 decades I didn't even open it until now. There isn't even a chapter dedicated to styles. A search for "style" yields a handful of pages for applying styles to images and shapes.
The Help is not very helpful either.

I googled Microsoft Word 2019 Product Guide and found nothing. Is there a manual for power users with the troubleshooting tricks? I don't need the how-to's, I need to fix stuff that go wrong. This issue had never happened to me in more than 30 years.
Regards
Nick