The Communication Centre (👤) is always accessible on the right side of the screen on every page. You can expand or minimize the bar by clicking at the bottom right.
The features are:
Settings
Attendees
Chat
Event Schedule
Notifications
The names of the sections are displayed when you put the mouse cursor over one of the icons.
If you click on the expand button at the bottom of the bar, the communication center will expand and show you the last section you used.
If you click on any of the icons, the communication center bar will expand and show you the respective section.