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Given a bitmap image such as PNG (which may already have sections with varying degrees of transparency), how do I change the transparency level of a section?

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1 Answer 1

up vote 15 down vote accepted

I have come up with these proposed methods, I don't know if there are better ones.

Increase transparency of selected area

  1. Select the area
  2. Cut
  3. Paste as new layer
  4. Select Layer properties and drag the Opacity slider
  5. Merge Layer Down

Decrease transparency of selected area

  1. Select the area
  2. Copy
  3. Paste as new layer
  4. Choose an appropriate color and use the Fill tool to fill the section completely
  5. Select Layer properties and drag the Opacity slider
  6. Merge Layer Down
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