If Use linear lead in/out is clicked then the following parameters controls the move off of the feature:
Lead-in angle: Angle measured away from the toolpath for the lead-in move. Note this angle can be negative.
Lead-out angle: Angle measured away from the toolpath for the lead-out move. This angle can be negative.
Lead-in length: Length of the linear lead-in length.
Lead-out angle: Length of the linear lead-out length.