A special thanks to all who have taken the time to help me resolve this problem. Probably best if I respond to everyone at the same time in my reply below. At the time I submitted my original inquiry to the Adobe Forum, I believe I was at Layer 4, which is a stamped visible layer of everything beneath it. (In a similar fashion, Layer 2 & Layer 3 are stamped visible layers of everything beneath them.) I was attempting to re-adjust the opacity of the “Wrinkles Layer”, but with no success; i.e., into Layer 4, at the time, (stamped visible layer of everything underneath), I was not able to change the opacity of the “Wrinkle Layer”. Yes, Bojan, I agree that it would be pointless to try to change the opacity of the stamped visible layer (Layer 4), since it’s a combination of all the layers below it. Actually, I want to change only the opacity of the “Wrinkle Layer”, - while preserving all the work done in the layers above and below the Wrinkle Layer. Keeping all layers intact, I, therefore, went back and made the “Wrinkle Layer” active. The opacity of that layer was still at 38%, as I set it earlier. However, any attempt to change the opacity from 38% did not result in any visible change in the image. In fact, contrary to what I would have expected, if I turned off any layer (eye icon) independently, there was no change in the image; e.g., if I turned off the “Wrinkle Layer”, wrinkles did not return; if I turned off the “Bags Layer”, eye bags did not return; i.e., if I turn off a layer on which retouching was done, then I would expect the retouching to also disappear, as the layer becomes invisible. However, turning off one layer at a time, starting at the top of the layer stack, does result in a visible change in the image as I turn off each, subsequent, lower layer that contains a particular retouch (e.g., bags, wrinkles, etc.). This leads me to believe that every time I make a stamped visible layer, that stamped layer incorporates all the retouching done on each layer below it. So, attempting to change or re-adjust the retouching on any particular layer below the stamped visible layer is of no avail because the retouching on that lower layer is already incorporated in the stamped layers above it. To Michael and Chuck’s point, if I turn off visibility of every layer above, say, the Wrinkle Layer, then I can re-adjust the opacity of the Wrinkle Layer, which becomes visible in the image. However, as soon as I turn on the first stamped layer above the Wrinkle Layer, opacity reverts to the original 38%, and not to any re-adjusted opacity. This seems to make sense, since any stamped layer created incorporates the original parameters of the layers beneath it. The global issue I have been struggling with recently in the PS learning process is – what workflow protocol should I be following, so that I preserve the option of returning to any particular layer and making a tweak or re-adjustment?? Recently, I tried refraining from creating stamped layers periodically along the way, but, if I remember correctly, - without creating a stamped layer, adjusting the layer opacity of the uppermost layer (after a specific retouch) wound up also changing the opacity of one or more of the layers underneath.
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