  9
   ,        9;      .

:
-     <>,                  9.         .
-          9,        9,       .         . 
-          9,        9,    <Ctrl> + <9>  .         . 
-          9,       .
-          9,   <9>  .
-               ,       .          .    
-            2D  3D    <>   .               2D/3D  .   
-       <>    .