Viewing Each Monitor Individually In A VNC Session

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Viewing Each Monitor Individually In A VNC Session

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So right now I am using the free version of RDM and using VNC to remote access some computers. Whenever I open up a VNC session, it'll display both monitors and I would want the option to switch between the two. Is there a way I can do while using FreeVNC as my VNC method?

All Comments (16)

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Hello

Thank you for the feedback. We're eager to expand the features available via freevnc and user feedback is a big driver of that.

I'll look into what's possible here - however, it's important to know which VNC server you are using? Multi-monitor support is not a part of the standard RFB protocol, but different vendors have implemented their own extensions so allow this capability.

Thanks and kind regards,

Richard Markievicz

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I am currently using TightVNC, but am I unable to figure out how to view individual monitors on a multi-monitor system. I know in the Actions tab under Commands, there is an option for "Select Full Desktop / Switch Monitor", but it doesn't do anything while under FreeVNC.

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Hello

Thanks for the update.

In a regular VNC connection in RDM, the "Switch Monitor" command currently only applies when connected to an UltraVNC server. It's also available when connecting to a macOS system using the Apple Remote Desktop connection.

To give some background: as I said, multi-monitor support is not a standard part of the RFB (VNC) protocol, and different vendors implement their own extensions for this. To my knowledge, UltraVNC and RealVNC both support something like this. Because UltraVNC is open-source, we're able to implement the same messages as them to drive this feature. RealVNC is closed-source, we don't currently have insight into how they implement this feature so we cannot support it when connecting to a RealVNC system.

For TightVNC, I did take a look at their documentation and sources but I couldn't see anything obvious that suggests they support multi-monitor in this fashion with their server. I'll keep investigating that but maybe you know if they have that feature in their own viewer?

Thanks and kind regards,

Richard Markievicz

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Thank you for the information. At least in the meantime, I can zoom in for TightVNC which will make things more visible even though each monitor will still be side-to-side depending on Window's orientation.

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Hello again

I assume that you're connecting to a Linux server? You might look at TigerVNC; it does seem to have an option to choose which displays are shared. Although it's a "connect-time" setting that's something we could incorporate into RDM (by using some kind of smart reconnect, probably).

Another idea for a workaround is to run a separate VNC server for each display (running on distinct ports). You could represent that in RDM by multiple connections entries.

Let me know if you have some questions or further feedback

Thanks and kind regards,

Richard Markievicz

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Hi, are there any updates on this feature?

I'm currently using UltraVNC and was wondering if there's a way to view or control only the second monitor instead of the primary monitor or all displays at once.

If not yet available, could you please confirm whether per-monitor selection is planned for future releases?

Thanks!

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Hello

I know that UltraVNC supports this and I think it should work with RDM, did you try this option to switch between the full desktop and individual monitors?

Screenshot 2025-11-07 at 16.11.56.png

Let me know if it works for you.

Thanks and kind regards,

Richard Markievicz