how to display a virtual desktop to a second monitor

KDE user.
I like to use 2 monitors connected to 1 computer.
Adding the second monitor was easy with ARandr.
Now I like the second monitor to display a virtual workspace. Possible?
Any hints how to do that?
Thanks

@Middlecope:

With the current KDE Plasma, there shouldn’t have been any need to use “xrandr” to manipulate the RandR settings for multiple monitors – in fact, you can run into conflicts between what KDE Plasma wants to do and, the RandR settings you’ve configured by means of “xrandr”.

Within the KDE System Settings → Workspace → Window Management → Window Behaviour –

  • With multiple monitors, you should be seeing a section at the bottom related to “Multiscreen behaviour” – enable “Separate screen focus
    ”.

You should then, be able to assign a separate “Activity” to that screen.

This is assuming that, within KDE System Settings → Hardware → Display and Monitor → Display Configuration – the screens have been correctly recognised and set up.

OK I don’t use xrandr anymore (deleted)
KDE recognizes my 2 monitors.
I have created a virtual monitor
In “Activities” I have a default and I added a second one
How can I couple the second activity to the second monitor?

Try a right click on the 2nd monitor and see if, due to the “Separate screen focus”, the 2nd monitor can be directed to use the alternative activity.