Advanced blend options - tone sample tool

[csp]

i do use blend options a lot but it always needs a little trial and error to target the tones i want to adjust,  a pipette tool to sample the target tones would be a great addition 

to a already powerful tool.

[anon1]

...and maybe also for curves adjustments?

for setting white black and mid -points ;)

I know there´s a picker already (v)