I have a JPG image that to my eyes has two colors (black and magenta) but to InDesign eyes (Separations preview tab) it has also yellow and cyan (in lower levels).
The newspaper will be printed only with magenta and black colors, so I need to remove the cyan and yellow colors from the image. And also this is the image when I unselect the colors.
I am watching videos since the past two hours, but I can't make this work. I have tried editing the image with Adobe Illustrator, but there are no swatches at all. Any suggestions?