Changes the alternate color space for a spot to CMYK.
If you want to change all alternate color spaces except for gray, select the Do not convert if alternate color space is gray checkbox.
The alternate color space is used as a ‘backup’ color space when the original spot color is not available on a specific output device, and when converting the spot color into CMYK. If this alternate color space is defined as anything other than CMYK or plain gray, the output results may not be up to standards.