When a Reference window is open, use the Previous Reference and Next Reference commands in the References menu to quickly browse through your references. The Reference window also includes arrow buttons to move to the previous or next reference.
When you select one of these commands (or click the buttons), the content of the References window changes to display the information for the previous or next reference listed in the Library window.
This command has the same effect as closing the reference that is currently displayed and opening another reference, so any changes to the currently opened reference will be saved before EndNote switches to display another reference.