It converts your artwork to CMYK through a real ICC colour profile, builds the spot plates from a selection you control, and writes a single layered TIFF that Photoshop and your RIP both read correctly — CMYK plus however many named spot channels you asked for. It replaces the manual routine of converting to CMYK, ⌘-clicking the layer, contracting the selection, and filling a new spot channel for each plate.
Sep 12, 2026