Where is this feature? I use my DSLR to copy negs shot on my collection of old 127 rollfilm cameras and use Photoshop to invert them, QI would be better for me.
I showed this a while back as a FUN challenge #13... but seriously,
The operation is simple. How you apply it up to your work flow.
In the Editor, You can use LEVELS, and swap the upper and lower slider settings.
H goes from 255 to 0, and S goes from zero to 255.
Or you can use curves. Swap the diagonal from normal southwest to northeast, to northwest to southeast.
Now here's the part where you have to decide how to apply it.
It is already a Predefined filter called "Negative.flt"So you can apply it after you have tweaked the image, Right click on a thumb, or you can set it as a Global filter to be applied last.
You could apply is while in the editor by FILE, OPEN Filter Params.
The trick to remember is that applying the "Negative.flt" from the Editor, using FILE.... OPEN..., will remove all other filters you might have used, like DFS etc.
Applying the NEG.flt from the right mouse on a thumb, will
add the Negative.flt
I think you have enough to work with Brian...
Hope this helps
Fred