Editing photos

[Ofnuts]

Make sure the layer is active, because when you work in the Channels list, this make the channel the active drawable and thus the target of the ensuing Curves/Levels/B-C operation. So you have to select your layer again...

As you would expectt, a good deal of this has been scripted.

[Kristal279]

Hi, there various ways to improve an image in GIMP. I recommend taking a look at this tutorial which focuses on the different tools available in GIMP. 

Since you are targeting the shadows and highlights, you should use the Dodge/Burn tool, a luminosity mask, the Curves tool and also the Levels tool

[rich2005]

@Kriustal279

It seems you like the edits101 web site. Why not just post a single thread in the tutorials section.

For this one, well the dodge / burn / sharpen tools are somewhat of a legacy from days gone-by. There are better options these days.