Tag Archives: trick

Tone Curves: Final Tips, Tricks, and Things to Avoid

[tweetmeme]We’ve had quite a journey with this whole histogram and curves ordeal:

And now I’d like to wrap things up with a few tips, tricks, and things to avoid when using curves. It’s a fairly simple tool once you begin to work with it and understand it, but there are a few non-obvious items worth pointing out.

what lies within?
Creative Commons License photo credit: Fifi LePew

TIPS

We’ll start off with a few generic tips for working with curves, then we’ll move on to the some of the more detailed stuff.

TRICKS

Here are a few tricks for the ACR/Lightroom interface under the “Point” curve.

  • Hold Ctrl and mouse over the image to see where the tones lay on the curve/histogram.
  • Ctrl+click over the image to set an adjustment point on the curve.
  • Ctrl+select adjustment points on the curve to delete them.
  • Ctrl+Tab to move between adjustment points without using the mouse.
  • Shift+select multiple existing adjustment points if you want to grab more than one at a time.
  • Shift+click over the image to set your neutral point for white balance (this works outside of the curves dialog too).
  • Shift+arrow keys to move selected adjustment points by 10 rather than 1.

And then we have a few general tricks:

Danger of Death By Failing
Creative Commons License photo credit: AlmazUK

THINGS TO AVOID

  • Watch for vertical sections in your curve — that produces an extremely high contrast and you lose all midtone data in that area.
  • Watch for horizontal sections in your curve — that produces zero contrast and you lose all midtone data in that area.
  • Too many adjustment points will be difficult to manage, just use what you need.
  • Avoid inverted slopes, they invert the tones. Can you roll a ball from the upper right point of the curve to the lower left (without relying on momentum)? If not, you’ve inverted a section of your curve.
  • Don’t clip your shadows and highlights (unless that’s what you really want to do). Keep an eye on your histogram for this one.

I’m sure there are a few hundred other tips and tricks out there for using curves, but I don’t know them all and I couldn’t cover them in one article even if I did. These tips, combined with the previous articles linked at the top, should keep most of you busy for a while. And if you’re looking for more, here’s my final tip on the subject:

Experiment. Try things out, push buttons, make mistakes, and keep learning.