What is purpose of Top Panel

New version of Jitsi has a top panel.
What I understand is it can only be seen when screen sharing is in progress and number of participants are more than what is set in config file.

My question who are shown in top panel ? All participants or speaker or pined users. And what is exact purpose.

In older version of Jitsi if person who is sharing screen also had camera on it used to show at right bottom screen. Is there a way to bring back that functionality?

You are not able to pin multiple participants to the large view area. Up to 6. We also now show thumbnails in addition to the screen-shares, since we support doing both at the same time.

The previous behavior, with the user camera on the lower right has been removed.