Photoshop-Style Curves Features

[Warhen]

I'd find this very helpful. While sampling an image w/ the cursor, Ctrl-Click would place a control point on the curve at that brightness level. Then, highlighting the output value, increase/decrease with the scroll wheel and/or arrow keys. Very useful in PS CS. Thank you Juan.

[chemstock1]

To add to this; I find the curves within PI very sensitive as compared to Photoshop. Sometime, I leave PI and use the curves within PS and then come back to PI.  I want to get as close as possible to the data without cropping any of it. 
CAH

[Warhen]

Sounds like perhaps you mean the opposite- that PS curves are more sensitive?