You modify a mixed ink swatch using the same methods used to edit other swatches. As you edit a mixed ink swatch or group, be aware of the following:
If you use the Swatches panel to delete an ink that is used in a mixed ink swatch, InDesign prompts you for a replacement. A mixed ink must contain at least one spot color, or it will be converted to a process color.
Changes you make to the parent of
a mixed ink group apply to all mixed inks in that group. (Changes
you make to a swatch in a mixed ink group apply to that swatch only.)
Converting a mixed ink to a process or spot color removes its association with its mixed ink group.
Deleting the parent of a mixed ink group deletes all swatches in the group.
Select a new ink to replace an existing component ink.
Click the box next to an ink to exclude or include it as a component of the mixed ink group.