The about <center_spec> context is the MAXScript equivalent of the rotate/scale transform center list on the main 3ds Max toolbar.

It defines the center point about which any scale or rotation operation is performed within its context.

Note that, like the center list in 3ds Max, this sets only the center point for the operation, not the axis.

The axis is taken from the current working coordinate system set using the coordsys context expression:

about selection 

Rotates/scales about the center of the current selection

about pivot 

Rotates/scales about each object's pivot point

about coordsys 

Rotates/scales about the center of the current working coordinate system set using the coordsys context expression

about <node> 

Rotates/scales about the pivot point of the given object

about <matrix3> 

Rotates/scales about the center of the coordinate system specified by the given 3D matrix

about <point3> 

Rotates/scales about the given point with coordinate system and axes taken from the current working coordinate system.

EXAMPLES:

   -- rotate all the boxes 30 degrees about the y_axis of $foo
   about $foo rotate $box* 30 y_axis
   -- rotate each planet 45 degrees around its parent
   in coordsys parent about coordsys rotate $planets* 45 z_axis