Re: Opacity in The Gimp
Depending on what you are trying to achieve, there at least two ways to change opacity:
How do you change opacity in The Gimp? I can't find the option.
1) With the desired layer active, move the Opacity slider at the top of the layers dialog to the level you want - this affects the entire layer.
2) Using any of the selection tools, select the area of the layer you want to change. Open the Layer -> Colors -> Curves... dialog and set the Channel option to Alpha. Grab the upper right end of the diagonal line in the graph area and slide it downwards to the amount of alpha transparency you want.
There are other ways, but you will use these two most often. Hope this helps you, and have a look at the online book, Grokking the GIMP is very helpful even though it's a bit dated.
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