oui 

en fait le pivotage vertical n'est permis que lorsque l'on utilise pas le span global 

je pense qu'il faut taper de ce coté la mais si quelqu'un maitrise le sujet ça pourrait aider 
Per-window options
  216  ------------------
  217  
  218  -screen <display>
  219  -screen0 <display>
  220  -screen1 <display>
  221  -screen2 <display>
  222  -screen3 <display>
  223  
  224      Specifies which physical monitor on your system you wish to have each
  225      window use by default. In order to use multiple windows, you must have
  226      increased the value of the -numscreens option. The name of each
  227      display in your system can be determined by running MAME with the
  228      -verbose option. The display names are typically in the format of:
  229      \\.\DISPLAYn, where 'n' is a number from 1 to the number of connected
  230      monitors. The default value for these options is 'auto', which means
  231      that the first window is placed on the first display, the second
  232      window on the second display, etc.
  233  
  234      The -screen0, -screen1, -screen2, -screen3 parameters apply to the
  235      specific window. The -screen parameter applies to all windows. The
  236      window-specific options override values from the all window option.
  237  
  238  -aspect <width:height> / -screen_aspect <num:den>
  239  -aspect0 <width:height>
  240  -aspect1 <width:height>
  241  -aspect2 <width:height>
  242  -aspect3 <width:height>
  243  
  244      Specifies the physical aspect ratio of the physical monitor for each
  245      window. In order to use multiple windows, you must have increased the
  246      value of the -numscreens option. The physical aspect ratio can be
  247      determined by measuring the width and height of the visible screen
  248      image and specifying them separated by a colon. The default value for
  249      these options is 'auto', which means that MAME assumes the aspect
  250      ratio is proportional to the number of pixels in the desktop video
  251      mode for each monitor.
  252  
  253      The -aspect0, -aspect1, -aspect2, -aspect3 parameters apply to the
  254      specific window. The -aspect parameter applies to all windows. The
  255      window-specific options override values from the all window option.
  256  
  257  -resolution <widthxheight[@refresh]> / -r <widthxheight[@refresh]>
  258  -resolution0 <widthxheight[@refresh]> / -r0 <widthxheight[@refresh]>
  259  -resolution1 <widthxheight[@refresh]> / -r1 <widthxheight[@refresh]>
  260  -resolution2 <widthxheight[@refresh]> / -r2 <widthxheight[@refresh]>
  261  -resolution3 <widthxheight[@refresh]> / -r3 <widthxheight[@refresh]>
  262  
  263      Specifies an exact resolution to run in. In full screen mode, MAME
  264      will try to use the specific resolution you request. The width and
  265      height are required; the refresh rate is optional. If omitted or
  266      set to 0, MAME will determine the mode auomatically. For example,
  267      -resolution 640x480 will force 640x480 resolution, but MAME is free to
  268      choose the refresh rate. Similarly, -resolution 0x0@60 will force a
  269      60Hz refresh rate, but allows MAME to choose the resolution. The
  270      string "auto" is also supported, and is equivalent to 0x0@0. In window
  271      mode, this resolution is used as a maximum size for the window. This
  272      option requires the -switchres option as well in order to actually
  273      enable resolution switching with -video ddraw or -video d3d. The
  274      default value for these options is 'auto'.
  275  
  276      The -resolution0, -resolution1, -resolution2, -resolution3 parameters
  277      apply to the specific window. The -resolution parameter applies to all
  278      windows. The window-specific options override values from the all
  279      window option.
  280  
  281  -view <viewname>
  282  -view0 <viewname>
  283  -view1 <viewname>
  284  -view2 <viewname>
  285  -view3 <viewname>
  286  
  287      Specifies the initial view setting for each window. The <viewname>
  288      does not need to be a perfect match; rather, it will select the first
  289      view whose name matches all the characters specified by <viewname>.
  290      For example, -view native will match the "Native (15:14)" view even
  291      though it is not a perfect match. The value 'auto' is also supported,
  292      and requests that MAME perform a default selection. The default value
  293      for these options is 'auto'.
  294  
  295      The -view0, -view1, -view2, -view3 parameters apply to the
  296      specific window. The -view parameter applies to all windows. The
  297      window-specific options override values from the all window option.
  298