Customize a login message that unauthenticated users will see in the login screen

A login message of your choice (in raw HTML) can be displayed in the login screen or login panel. This message will appear directly above the login button. 

1. In your library settings, go the Permissions tab.

2. Scroll down to the Additional content in your logion form textbox. Insert your message in HTML format here.

3. Hit Save Changes.