Alt-Y - Style
 Select a display layout mode.
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 This option allows you to change the way in which MrDebug auto arranges the
 windows. There are two options for auto arranging:

    Option 1: the source code window takes up the whole length of the screen
    Option 2: the watch, variable call stack take over the right hand side
              of the screen

 This option only works whilst you haven't moved any windows. When you start
 moving windows, this option will only work if you use the Reset All option
 first.