12 Post colour correction
Now that all the colours are finished, I merge the layers together. Then I select and copy the whole canvas. Now in the History panel, I go back to before I merged all the layers, and paste in the merged version of the artwork as a new layer. This creates a single layer of the artwork in its present state that I can modify without losing what I’ve done. I then use image adjustment tools to tweak the final colours and tones.