I'm a Zoom host, using Windows 10 Home on a laptop. Sometimes my participants complain about seeing solid gray rectangles on their screen. This happens when I share a process that is showing an image or video full screen. These boxes could be caused by various windows on my computer: the two rectangular Zoom meeting control rectangles, the Zoom Participants box, the Zoom Chat box, or other apps such as file explorer or browser. When I share a full screen image or video, I want my participants to see only that, not additional overlaying gray boxes. Is there a setting for this? If not, when are the gray boxes shown and when are then not shown? Note: web searches show no information about gray boxes or rectangles caused by Zoom.
I am not a developer, but this issue has been plaguing us as we run a video for participants but also need to monitor the chats and participant windows. The only people who can see the issue are participants. The host sees their normal windows which tend to be persistent and pinned on top of the other zoom content. Normally these windows are simply hidden entirely from the view of the participants during other screen share modes with video optimization turned off. No placeholder gray boxes or anything.
Turning off the optimization is a workaround and not a solution as it leads to syncing issues with the audio and video. That workaround may be fine for others, but it does't work for us and doesn't seem to be an intended solution as it is only a problem on the Windows 10 platform as far as my Google searches have revealed.
Our workaround has been to have the host log in on a second device and monitor the chat and participant windows from there. We can hide all of the zoom chat/participant windows and hide the floating settings window.
This is not happening on our Mac OS devices. Just the Windows 10. It doesn't seem to be a feature. It seems to be a bug or an implementation issue on Windows 10.
We've been running Zoom meetings for about 3 months now, we encountered those boxes several times and one of the best solutions we found to get rid of them was the same as Ryan's solution, which is to share screen from the laptop and control the participants from another device (smart phone).enter image description here
I figured it out myself, with some experimentation, running as host and participant in the same meeting. The solid dark gray boxes are clearly a security mechanism by Zoom to prevent participants from seeing other windows on top of the shared window.
Why should participants be able to see other windows, you ask? Well, it's simple and complicated at the same time. Instead of simply sending the video being shown directly to the participants, Zoom intercepts the hardware to capture the data as it is being displayed. So you see the topmost shared window AND any windows that are on top of it! Graying out the window prevents participants from seeing whatever the host is doing, for security.
So the solution appears to be pretty simple: just turn OFF the "optimize for showing video" option. Then Zoom simply sends the shared window, again and again (at 6 to 30 frames per second, depending on source and destination bandwidth) to the participants and ignores other windows. In fact, with Optimization off, you can even minimize all windows and/or return to the desktop, and the participants continue to see the shared window only.
For the Zoom meetings I host, I want the best experience for my participants, so I set up muting and other options the way I want, then I show the video in a video player, share the player output, and optimize it. I make sure that all other windows are never displayed on top of the video on my screen while the video is running, and I keep the cursor at the extreme lower right so it is not seen. I avoid any use of the cursor or of Zoom features while I am playing a video. This works perfectly for me, because we don't use chat or other features when playing videos.
Even if I do turn off the chat, the floating control panel, and the participant window, if I am screen sharing a video, and am sharing sound and video( by clicking those boxes in the screen share screen) any time a participant is booted, or arrives late, they land in the waiting room, the floating control bar comes back, and box appears notifying me that someone is in the waiting room greys out the attendees screen...This has only become an issue when Zoom removes the ‘disable waiting room feature’ recently. Prior to that once the meeting began I could disable the waiting room, so if people got booted, and/or arrived late, they could just re enter without me having to deal with it, and without it interfering with my attendees experience.
Why oh why are we no longer permitted to disable waiting room?? The would resolve more than one issue I am currently having with Zoom.
Read the "Advanced share screen options" setting on this page: https://support.zoom.us/hc/en-us/articles/360037870291-Advanced-desktop-client-settings
There is an option to "Share selected app window only" that you can turn on. And there are also screen capture modes that "capture with window filtering" which claims to not show windows from the Zoom client.
i found a solution of zoom gray boxes problem. https://youtu.be/CRCCWBLPhlk