A screenshot from CHASE for Windows. Some of the toobar buttons are active and will take you to other pages.

CHASE for Windows is designed to be used by different people.  It is likely that some of these users will have access to a limited number of the CHASE functions - for example it is not a good idea to allow too many people access to the editor functions.  The Users window allows an administrator to set up new users names and assign appropriate functions to them.