  1
   ,        1;      .

:
-     <>,                  1.         .
-          1,        1,       .         . 
-          1,        1,    <Ctrl> + <1>  .         . 
-          1,       .
-          1,   <1>  .
-               ,       .          .    
-            2D  3D    <>   .               2D/3D  .   
-       <>    .