Brightness Curve question

[johnp]

I'm using the 'double histogram' mode to lighten a portion of an image.
In this mode, a point on the upper (input) histogram is linked to a point
on the lower (output) histogram. Is there a way to move both points simultaneously
to the left or right instead of having to move the upper and lower points separately?

Likewise, is there a way to move all the points (except the far left and right points) together?

Thanks!

John P

[jsachs]

There is no way to move more than one control point at a time, either using the double histogram or the curve mode.