OpTaliX Version 10.80

Changes to version 10.80:

· "Undo" and "redo" options added. A virtually unlimited number of parameter changes can be undone and redone.

· Ray aimung, i.e. the generation of rays, is now significantly faster, is more stable and produces less spurious output.

· A bug in the distortion calculation was corrected, when the field was defined by paraxial or real image height (YIM or YRI).

· Minor tweaks.