You can change message text as long as no one else owns the
message. If you change the message text of an unowned message, you
become the owner of the message.
NOTE:
You can add hyperlinks to URLs in your message or instruction text.
Insert your cursor in the text of an active message on the
Text tab and type the required URL. Apply and save your
changes. This feature is useful for linking to external sites of
all types, such as support sites, documentation repositories,
troubleshooting information, and similar sites.