Please Read A first!

Target RGB calls for a bit more explanation, but I'm sure it will make sense, and will be a great tool.

RGB refers to the values of the Red, Green, and Blue of a particular spot you clicked on to select a tone.
It is very tight/narrow, and DFS will sharpen the color produced by that set of color values....
So you add sharpening, (a lot to be sure (5/300)) and you don't see anything. There's just not enough pixels with those values in a bunch.

What next?
The EQ slider is at 100% to the right when Tone Targeting is used, so we have to move that to the left, from 100% to 95%.
Then we hold the yellow button to see if we are showing any sharpening.... hmm, not quite?
Move to 90%, and maybe 85%... Keep checking your spot.

What did we actually do?
We took those rigid RGB values, and added some leeway above and below.
So a hypothetical Color of 230, 192, 183. will now sharpen even if the color values are plus 10 or minus 10, on either side.
From 220 to 240. From 182 to 202. From 173 to 193.... anything inside that range will sharpen.
You control the range with the EQ slider %

Useful? You bet!

See attached screen snaps.  Remember to click on the images to enlarge.

Object in this exercise is to sharpen this lovely lady's eyelashes and only her lashes.
Snap 101 is unsharpened.    Snap 100 is showing Targeted RGB sharpening.

Snap 99 is not sharpened, and 98 is sharpened... same as the others above but less magnification... to show clearly that nothing else was sharpened only the eyelashes.
You have to use your own ideas with your own images...
Have fun,
Fred