I am using GIMP 2.6.11. I have an image I am trying to convert to having a transparent background. I have done this many times. I use the select by color tool, and add layer to alpha channel.
When I select color to alpha from the transparency option, it displays the preview of how it will look. This has the original background converted to the checkerboard background as expected. When I select okay to commit, nothing happens to the actual image on the canvas. What am I doing wrong, because there is not any messages popping up when committing. It just doesn't follow through with the change.