You can show or hide the columns of a list (list: A Web site component that stores and displays information that users can add to by using their browsers. Requires a Web server that is running Windows SharePoint Services.), document library (document library: A folder where a collection of files is stored and the files often use the same template. Each file in a library is associated with user-defined information that is displayed in the content listing for that library.), or discussion board.
If you want the new view to be the default view, select the Make this the default view check box.
Create a view
Display sorted or filtered items
Change the name or file name of a view
Set a default view