User list is in the lower left region of main window. Right click in the user list region, and then right-click menu will pop up as below:
Add Department: Click this to add department
Add User: Click this to add user
Modify: Click this to modify the department or user name and port value.
Delete: Click it to delete the department or user. If the department is deleted, all users of this department are also deleted.
Monitor one user/Monitor all users: Select it to monitor one user or all users according to your need.