Also easier to search for. Recently I had to perform a very simple image manipulation: given two images, I wanted to use the second one (which was all graysca

Also easier to search for. Recently I had to perform a very simple image manipulation: given two images, I wanted to use the second one (which was all grayscale) as the alpha channel for the first one. I spent quite some time googling for things like [gimp alpha channel] and reading various tutorials, which were very nice with screenshots etc. and still I couldn't really replicate the process. Then in a flash of genius I replaced "gimp" with "imagemagick" in my query. The first page Google took me to contained a command line which I copy-pasted and it did exactly what I needed.