Multichannel mode images contain 256 levels of gray in each channel and are useful for specialized printing. Multichannel mode images can be saved in Photoshop, Large Document Format (PSB), Photoshop 2.0, Photoshop Raw, or Photoshop DCS 2.0 formats.

These guidelines apply when converting images to Multichannel mode:

• Color channels in the original image become spot color channels in the converted image.

• Converting a CMYK image to Multichannel mode creates cyan, magenta, yellow, and black spot channels.

• Converting an RGB image to Multichannel mode creates cyan, magenta, and yellow spot channels.

• Deleting a channel from an RGB, CMYK, or Lab image automatically converts the image to Multichannel mode.

• To export a multichannel image, save it in Photoshop DCS 2.0 format.