.NET Preferences
How to set System Preferences
In the TWAdmin workspace, navigate to preferences on the VTB. Form this location you are able to edit preferences at the Enterprise, Organizational or User level and determine if users will be able to override certain preferences on the front end.
Setting Preferences at an Enterprise Level
Setting Personal prefrences from TWAdmin
How a User can set thier own Personal Preferences
Preference List and descriptions
Preference List and descriptions are described in detail in this link