This option allows you to make precise adjustments to individual color channels in an image. You may click Edit at the Menu bar or click Adjustments at the Process toolbar and choose Curves.

Here is Curves dialog box:

As Curves dialog box opened you can see the preview of the result at the Preview area.

Click Apply you want to apply changes to one file. If you don't like effect, use CTRL+Z combination or Edit -> Undo from the menu bar to move back to the original image.

Choose the quality of the output JPEG file:

And click Save.

• Auto adjustments
• Brightness
• Contrast
• Levels
• Variants
• Color replace