So at the most concrete possible level, here is a suggestion on how to start: Step 1: Add a "Color Management" page to the Preferences. Step 2: Add "enable/disable color management" and "working colorspace" options to the page. To start with, sRGB will be the only option for the latter, but the infrastructure should not build in any assumption that this will always be true. Step 3: In the file-loading code, after an image has been loaded, check for the presence of parasites called either "icc-profile" or "colorspace". If one of these is found, execute the color management plug-in. Step 4: Write a color management plug-in. Best, -- Bill ______________ ______________ ______________ ______________ Sent via the KillerWebMail system at primate.ucdavis.edu