replace one channel by another on only one layer, leaving the others intact?
hello. in cmyk image, need turn on 1 layer 1 channel another, while others remain intact. m channel (the m on layer) contains information, can't print m in place. want change equal amount of k (or c, in present case, or mixture of two). know how entire image (change greyscale, duotone or whatever may apply). since need apply 1 (or selection of) layer(s), leaving others intact, not option here. i'm sure there's way achive this, can't find it. advice appreciated.
just use channel mixer percentages set 100% , 0 appropriate channels.
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