How do you remove Read$-$Only protection from a document?

Open the document as Read$-$Only, and then click the Always Open Read$-$Only command on the Protect Document drop$-$down menu.

Open the document as Read$-$Only, and then save it$.$

Open the document as NOT Read$-$Only, and then click the Always Open Read$-$Only command on the Protect Document drop$-$down menu.

Open the document as NOT Read$-$Only, and then save it$.$