My understanding is that BBB must open with all the options showing - two sidebars plus a presentation pane plus video thumbnails. I find that some people like this, and some don’t, compared with the mode that Zoom start up in (which is the opposite). There are no configuration switches (in Greenlight) that will alter this. The only tweak that’s available is for the room owner to set the presentation that appears on start up. This can easily be a blank pdf page, a photo of your favourite rabbit, or whatever. It could be a page saying: To remove this presentation pane, click the little blue minus button up there, top-right.
I have a custom startup page in a couple of my rooms, different pages for different rooms.
Getting rid of the presentation pane (top-right ‘minus’ button) is something that has to be done by each individual user. I assume that changing this (ie to a preset automatic action) is somewhere down in the guts of BBB, and is a piece of programming that meet.coop wouldn’t have the time (the priority) to attend to at this time?
Whether meet.coop should put up a standard blurb on meet.coop, as the default presentation, is another question? Or a blank page with a small watermark, or whatever.