Thanks Richard! What I'm really trying to find out is the format for entering densitometer readings into the text file. In the "LINEARIZE=measurement measurement measurement etc..." line, what are the specific "measurements"? If I read my test patches with a reflective densitometer, what is the syntax for the correction? Let's say my 50% patch has the density I want in my 60% patch, do I write LINEARIZE=50,60? Just not sure of the proper grammar here. Thanks again for taking the time to answer my question. Scott