how to eliminate the green dominance to 400 photos that are the result of the scanning of old slides
what to do to apply the same correction to all the photos with a single action
what to do to apply the same correction to all the photos with a single action
I would suggest trying the raw editor with a small batch.
File >> Open in Camera Raw
Select all from the left hand filmstrip
Experiment with the tint slider e.g. magenta is the opposite of green on the color wheel - see image.
You might also try the temperature slider to warm or cool the images.
When done, click the button (bottom-right) “Open Images” to send them into the rgular editing workspace where you can re-save.

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