gfx change_identifier help::

  gfx change_identifier

     <data_offset #[NOT SET]>
     <element_offset #[NOT SET]>
     <face_offset #[NOT SET]>
     <group PATH_TO_REGION[/]>
     <line_offset #[NOT SET]>
     <node_offset #[NOT SET]>
     <sort_by FIELD_NAME[.COMPONENT_NAME]|none[none]>
     <time #[0]>

This command is very useful during mesh building and for [CompactingIdNumbers] before transfer to the backend.

To renumber the elements, faces and lines do::

  gfx change_identifier element_offset 1 sort_by cmiss_number;

> To renumber the nodes and elements to start from ONE 

  gfx change_id element_offset 1 node_offset 1 sort_by cmiss_number 
  
  (NOTE: IN THIS CASE THE OFFSET NUMBER IS THE NUMBER YOU WANT THE 
   NUMBERING TO START AT, IT IS NOT AN ACTUAL OFFSET)