Please open one document on Mac with Word for Mac.
Go to Word button on the top of screen> Preferences > AutoCorrect.
Go to “AutoFormat as You Type” tab and look under “Replace as you type” section.
Make sure the option of “Straight quotation marks” with “smart quotation marks” is ticked.
Besides, you may also go to
Edit > Find > Replace, then find all the symbols and replace with the symbols that you want. Please note, it is recommended to make a file backup first.
Hope the information, could help you.
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