Note that the only options for the Pencil Cut operation are None and Arc.
None
There are no lead moves.
Arc (Pencil cut only)
The lead move is an arc.
Line On Final
A straight line move is used for the leadin or leadout move on the final pass. No other pass will have a leadin or leadout move.
Arc On Final
An arc move is used for the leadin or leadout move on the final pass. The arc move is tangent to the final pass and moves in the same direction.
The tool can leave a mark on the side of the part at the start point of the final pass. An arc move for the leadin can prevent this mark.
Line On All
A straight line move is used for the leadin or leadout move on all passes.
Arc On All
An arc move is used for the leadin or leadout move on all passes.