How do I show multiple slide shows vertically?

I would like to show 2 presentations on 4 monitors. Each monitor has a resolution of 1600 x 1200. Each slide show should span vertically: the slide shows would be 1600 pixels wide by 2400 pixels tall. How do I achieve this configuration through PowerShow.

The following configuration steps will enable you to set this environment:

1. In Windows, open Display Properties: Either
   1. Right-click on your desktop and select Properties, or
   2. Select Start | Control Panel menu item, and launch Display applet.
       
2. Select Settings tab.
3. Arrange the 4 monitors in the following order:
   
   
    
4. Click OK.
    
5. Launch PowerPoint. Open both your presentations (say, Presentation1.ppt and Presentation2.ppt).
6. Select Slide Show | Power Show... menu item.
7. Select Presentation1.ppt <Slide Show> across 2 monitors in first row.
8. Select Presentation2.ppt <Slide Show> across 2 monitors in second row.
9. Click Start Show button.

These configuration steps enable you to display Presentation1.ppt vertically on monitor 1 and 2 and Presentation2.ppt on monitor 3 and 4. The key point to note is that the monitors are configured as vertical in Windows.

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