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I'm trying to edit a small png image (4 x 8 pixels) in Gimp, but it's impossible to change some colors with Bucket fill tool or color to alpha for part of the image.

Do you know how to edit the image? Best would be color to alpha.

thank you

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migrated from stackoverflow.com Jun 1 '11 at 11:27

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Zoom and use a pencil with the selected color. You can draw with a one pixel point. You could also do quick toggle to work with the alpha and draw with the pencil in white/black.

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Thank you, pencil works. Where can I find "quick toggle"? –  xralf Jun 10 '11 at 20:08
    
Its in the lower left hand corner- it makes a red filter over the surface of the image and you can draw on it with black or white to make positive or negative alpha. It's super cool, I use it all the time. You can find it under Select> toggle quick mask. Here's a link to the documentation. docs.gimp.org/2.6/en/gimp-channel-dialog.html#gimp-qmask Thanks for using Gimp! –  Ele Munjeli Jun 11 '11 at 2:40
    
Thank's a lot, this really helped me. –  xralf Jun 11 '11 at 11:08

you can use Colors->Hue and Saturation to change colors
or you can colorize the whole image to one color with Colors->Colorize

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it writes Hue-Saturation operates only on RGB color layers –  xralf Jun 1 '11 at 9:11

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