Sort your EndNote Library by clicking on the appropriate field heading at the top of your reference list (e.g. Author, Year, Title or Journal) or, select Sort Library from the Tools menu.
Change how your references are displayed in the main library window - including removing or adding fields. Click on the Edit menu at the top of your EndNote Library, and then Preferences.
From the Preferences list:
There may also be the need to edit individual references (e.g. if there is a mistake with spelling or dates).