Whether the string you're looking for inside a text file is a single word or a complicated pattern, PowerShell has the ability to find and replace just about anything.

This is how you can find and replace Text in Notepad on Windows 11/10. You can even replace multiple texts at once in Notepad by following this trick.

When faced with a massive reformatting task, try the replace feature or modify a style before going the manual route in Microsoft Word.