Server/Graphics Monitor Display

1.) Right-click the connection that you want to change
2.) Select "Show More Options"
3.) Click "Edit"
4.) A little popup window should show up, go to the "Display" tab

5.) Check or uncheck "Use all my monitors for the remote session"

6.) Go back to "General" tab
7.) Click "Save As..."
8.) Go to the Desktop
9.) Click Save

If it asked you to overwrite, you can either click "Yes" or change the name to something different