Correction with a reference white

In taken as an example image the clouds have a pink tint, which should be replaced with the white color. In this case we need no source image.

1. Open to-be-corrected image.
2. Click the "Reference white" button. The base color's container will be painted white.
3. In the image highlight the area, which must be turned into white (part of the cloud).
4. Click "Start" button.

Before correction

After correction