User blog comment:Cosmic Deer/Not happy at all./@comment-27329741-20170903231554

On that little drop-down arrow next to the "Edit" button you should see "Change protection" or something like that. Click that, and find the setting you want (default is Allow all Users, and the other settings are where new and unregistered memebers cannot edit and the other one is where only Admins and content moderators, or makers of the page, are allowed to edit the page)

hope this helped!