Can I change the colour mode?

Photoshop: To convert a document from RGB to CMYK in Photoshop, open the image and go to Image > Mode > CMYK Colour.

 

Illustrator: To convert a document from RGB to CMYK in Illustrator, open the image and go to File > Document Colour Mode > CMYK Colour.

 

Remember to check the colour of your converted design to the original!