* If you use a name that is shorter, contains only lowercase letters, numbers and/or dashes ("-"), this will set the host's static name, and the pretty name will be left blank.
* If you enter a name that is more descriptive, contains mixed-case and other types of characters, this will set the pretty name, and a static name will be derived from that automatically.
In the previous example, "Emily's 2nd dev laptop" was entered via the Settings app, and the static hostname "emilys-2nd-dev-laptop" was set automatically.