A possibility to control the curves using the keyboard would be extremely 
useful. I process thousands of scanned negative colour film frames with 
Photoshop and have found keyboard control to be very much faster and precise 
than mouse control since the images ivariably need adjustment. I would like to 
be able to step through the control points and adjust each of them with the 
arrow keys. I often set the black point, the white point and the colour 
balance for a neutral gray area using only the keyboard. In setting the colour 
balance for a neutral grey, the keyboard entry would allow me to place the 
colour picker on the gray area, select the curve (value, red, green or blue) 
from the keyboard and adjust each of the curves to have the same value in the 
info window. Without keyboard control the mouse has to be moved back and forth 
between the Curves window and the image window which is very slow and 
inconvenient. Keyboard control of the parameters in other tools would be 
welcome as well. Every heavy user of an image editing program highly 
appreciates as complete keyboard control as possible.