Once you click “New Alias”, a screen will appear asking you what you want your alias to be and the value associated with it. The value can be anything you want. The max data size is 3.2kb. Both the alias name and value are publicly visible via Syscoin’s alias search.
*NOTE:* Aliases are case-sensitive! The Alias “john_doe” and “John_Doe” are completely different and are NOT interchangeable!