It is at least a two step process, once at the capture stage , once at final print stage.
The final sharpening on the computer must be seen on the print on the final medium, glossy is different than matt, both far different than computer screen, and it depends on final print size. Portraits are different than landscapes.
It is kind of a black art, but the book will help get through the weeds. $35 at Amazon.com
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