NAME
	  DtFrameSetBy - Set the interval by which frames are skipped
	  in the animation.


     SYNOPSIS
	  #include <Dt.h>


	  void	DtFrameSetBy( int by )


     DESCRIPTION
	  DtFrameSetBy() sets the interval by which frames are skipped
	  in the animation.







     FILES
	  Link with -lDtOMio