Open Adobe Illustrator and use the pen tool to create the outlines around your design.
Be sure to use a 2pt stroke with no fill color.
Grab the dieline with the white pen tool and assign a color swatch that is not a color being printed within the design (magenta works great).
Double-click on the color swatch and change from a process color to "Spot Color."
Name the swatch "CUT" for a through cut.
To create vinyl lettering, you must select a color other than your "CUT" swatch color. Name the new color swatch "Kiss_Cut" and assign it to the vinyl lettering outlines.
For more detailed instructions with images, see our guild on prepping cut files.