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By now I've learned enough about Affinity Publisher that I'm ready to create a small book of photographs to be printed by an online book service that uses a four-color process. I have just noticed something in creating a template, which I first set up in CMYK color space using the default color profile for CMYK: In Publisher's dialog shown via File > Document Setup, there an option to select "Assign" or "Convert." However, the option to select Assign, versus Convert, does not appear in the dialog displayed via File > New. Thus the option appears only after you've created the document. I assume these terms have the same meaning here as they do within a program like Photoshop—what should the program do color-space-wise when an image is opened or placed? Is this option's absence from File > New intentional? If so why would that be? Whichever option is selected—Assign versus Convert—what is the effect when placing images exported from a RAW editor in, say, sRGB or Adobe RGB once they are imported into the document? There doesn't seem to be any "leave in native color space" option—it's assign or convert. The purpose of selecting CMYK is that the book company requests that text be in CMYK color space. This is presumably to avoid "full" black which can cause problems on the press. But now I am wondering if this kind of document should be in an RGB color space throughout its creation, and then converted to CMYK on export to PDF—with Publisher instructed to leave images in their native color space at that time. Advice much appreciated.