First the text fields are read. The view is changed to that set of angles, and then the crystal is repeatedly drawn, each time from a modified point of view. The crystal is redrawn from the point of view given by the text fields. You must stop the crystal in order to edit those text fields. It is included so that you can easily cause slight rotations to occur.
Standard form means that the miller indices of the highest face of the form is displayed.
I really regret coding that up, and I am gonna remove it first thing. Improve performance of crystal shape calculation. Take advantage of crystal symmetries when computing edges. They are synchronized. Same above two questions, except that the experiments are done on the equator.