Create the cutting line as a separate vector path above the design. The line should be clearly visible and closed. It must not be made from a pixel graphic.
The contour is not intended to be a visible part of the print, but should define the cutting line only.
1. Create a new layer above your design.
2. Use the path tool to create the desired shape.
3. Define a spot color in 100% Magenta and name it βCβ.
4. Color only the contour of the created shape with the spot color.
5. Make sure the contour is set to βOverprintβ.
6. Export the file as a PDF in X-3 format.