CNCSimulator Pro

user guide
Index Facing

Facing is used to remove material from the end of the workpiece to create a flat surface. You do not need to create a contour on a Facing layer but instead you should add two points that defines the "operation window". If you are not sure how to do that, please read about it under roughing.
There is no dedicated tab for facing in the Cutting Operation Parameters dialog.
You use the Standard parameters to decide the cutting depth and retraction for the operation. The two points on the layer decide where the operation will start and end.