https://www.epo.org/en/node/what

What will I see on the screen?

You should normally be able to see all the participants, although how many you can see at any one time will depend on the technology you use for connecting to the VICO. In general, different views are available, most notably Gallery view, which shows all participants in a grid pattern, and Speaker view, which shows the person speaking in a larger window. In Gallery view, you can rearrange the video tiles by clicking and dragging them to create party-specific groupings. Please bear in mind, however, that any customisations made may be lost if you exit this view (e.g. by switching to another view/virtual room) and may have to be re-done when you switch back to Gallery view.

Visit Zoom support for more information.