In ChatPlus, you can display "Chat Unread Badge" to users.
To display, you have to set these below.
(1)Click the setting button on the upper right of the management page.
(2)Click [Chat]>[Design]>[Menu] on the left side of the screen.
(3)Click [Stand by] tab
(4)Click [Detailed Setting]
(5)In the section "Option", check in the box [Display Unread Badge]