Photolisa · color and tone

Curves Adjustment

Curves adjustments remap input tones using control points on a tonal curve.

Image tool workspace

Enable JavaScript to use the processing controls. Tool instructions and limitations are available below.

Understanding curves adjustment

Curves adjustments remap input tones using control points on a tonal curve.

Add small changes first and check whether highlight or shadow detail is clipped.

A practical workflow

  1. Choose the required source files, if any. Files are handled as stated in the workspace privacy label.
  2. Set the available controls and apply the operation.
  3. Compare the actual output, check its dimensions and download the generated file.

Decisions and limitations

  • Input/output curve points

Images up to 16 megapixels and 20 MB. Keep an original copy. Export preserves pixels, not editable layers or original metadata.

Questions about this task

Where do I use the current tool?

Apply the selected adjustment and export a PNG copy.

What should I check for curves adjustment?

Add small changes first and check whether highlight or shadow detail is clipped.

Which settings and formats are confirmed?

PNG. Images up to 16 megapixels and 20 MB. Keep an original copy. Export preserves pixels, not editable layers or original metadata.

Levels Adjustment

Levels adjustments set black, white and midtone reference points.

Available

Hue and Saturation Adjustment

Hue and saturation adjustment changes color angle and color intensity.

Available

Shadow and Highlight Adjustment

Shadow and highlight adjustment changes dark and bright ranges separately.

Available

Duotone Image Filter

Duotone maps dark and light areas to two chosen colors.

Available

Color Overlay

A color overlay tints an image by blending a solid color over its pixels.

Available

Color Replacer

Color replacement selects a source color range and substitutes a different hue.

Available

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