If you can' type in Word, then you must activate Office or remove the document protection to remove the Selection is locked message.

A recommended approach to secure your most private documents — whether it’s a PDF, Word file, or Excel spreadsheet — is to lock them with a passcode. While this does help keep sensitive ...

Scaling a document in Microsoft Word is often necessary when you need to adjust the content to fit a different paper size, whether for printing or other purposes.