Hi, I want to create a greyscale image, dimensions 540x1 pixels @ 72ppi, of 20 solid steps from pure white to pure black. I have tried creating this by opening a greyscale file of the above size, using the gradient tool from black to white and then posterising to 20 levels. Unfortunately the individual steps aren't all the same size, the dark and light end steps are slightly wider. The final image is to be used on a web page of black and white photographs, for contrast and brightness monitor calibration.
TIA
John
TIA
John