You can brighten the butterfly eyes by applying a lens.

  1. In the Objects Docker window, click the eyes thumbnail to select it.
  2. Click the Create Mask From Object(s) button.
  3. Disable the Lock Object Transparency button.
  4. Click the New Lens button.
  5. In the New Lens dialog box, click Tone Curve.
  6. Click OK.
  7. From the Channels list box in the Tone Curve dialog box, choose RGB Channels.
  8. Click the Curve button.
  9. In the interactive grid, drag the response curve to create an S-shaped curve.
  10. Click OK.

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