Ken and Hu,
The program saves the drawing steps to a temp file. That's why you can undo or redo any and all steps you make.
Then when you generate tool paths it saves those steps also to a temp file attached to the cad file. That's why you can Edit operations,IE; tool paths, or reorder them. That's also why when you reopen the file the nc operations are still there.
Then when you post the operations it takes those operations you have selected and turns them into code to reflect your config.
That said, it only uses the operations that you have generated and selected to give you machine code. So no Ken it dosn't use the unselected steps you took to make your final model.
Hu the steps are not really " totally obliterated". Just "irrelevant" as far as the machine code is concerned.
Clear as Mud.
