rc.xml

    <applications>
        <!-- Match all Steam and put them in middle monitor centered -->
        <application class="steam*">
          <position force="yes">
            <x>center</x>
            <y>center</y>
            <monitor>2</monitor>
          </position>
          <maximized>false</maximized>
          <focus>no</focus>
        </application>
        <!-- Match main Steam window and maximize it -->
        <application name="steamwebhelper" title="Steam" class="steam">
          <position force="yes">
            <monitor>2</monitor>
          </position>
          <maximized>true</maximized>
          <focus>no</focus>
        </application>
        <!-- Match Steam friends list and put it on far right monitor -->
        <application title="Friends List" class="steam">
          <position force="yes">
            <x>1643</x>
            <y>0</y>
            <monitor>3</monitor>
          </position>
          <size>
            <width>277</width>
            <height>1050</height>
          </size>
          <maximized>false</maximized>
          <focus>no</focus>
        </application>
        <!-- Match discord and put it on right monitor -->
        <application name="discord" class="discord">
          <position force="yes">
            <x>32</x>
            <y>100</y>
            <monitor>3</monitor>
          </position>
          <size>
            <width>1582</width>
            <height>847</height>
          </size>
          <maximized>false</maximized>
          <focus>no</focus>
        </application>
    </applications>