How do I manage two separate displays in WPF?

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C#

WPF

Caliburn.Micro

I am writing an application which will allow users to select from a series of maps on a touchscreen display, and then the maps will also display on a larger wall-mounted screen. Users will be able to pan/zoom/rotate around the maps and I would like the wall-mounted screen to show those changes in sync with the touchscreen.

What is a good way to approach managing the two displays?

Currently, I have the application set up in MVVM format and am using Caliburn.Micro.

Each map is in its own UserControl and they are activated in a ContentControl on my ShellView using Conductor and ActivateItem in the ShellViewModel. I would like to have the Active Item also be displayed in a separate Window (on the wall-mounted screen).

Here is the code so far:

ShellView.xaml:

<Grid>
       <!--The Content control shows which MapView is currently active-->
       <ContentControl x:Name="ActiveItem"/>
           <StackPanel>
               <TextBlock Text="Select a map.">
               <ComboBox>
                   <Button x:Name="LoadMap1">Map1</Button>
                   <Button x:Name="LoadMap2">Map2</Button>
                   <Button x:Name="LoadMap3">Map3</Button>
               </ComboBox>
           </StackPanel>
   </Grid>

ShellViewModel.cs

public class ShellViewModel : Conductor<object>
{
    public ShellViewModel()
    {

    }

    public void LoadMap1()
    {
        ActivateItem(new MapOneViewModel());
    }

    public void LoadMap2()
    {
        ActivateItem(new MapTwoViewModel());
    }

    public void LoadMap3()
    {
        ActivateItem(new MapThreeViewModel());
    }
}

I do not know if this is the best way to set this up, but it works well for loading the maps on the ShellView. I really just need to show the same thing in another window for the wall-mounted Display

Any help appreciated, Thanks!

What I have tried:

I have tried using a VisualBrush but don't know if I can bind it across two Windows.