I did that, but I don't want the x-axis to start from 0, if you know what I mean. Because I have points that I want to show at x=0.0 and I want to shift the x-axis slightly to the right so the readers can see that. At the same time, I want the fitted line to only fit between x=0 and x=1. So when I try to slide the axis to the right using the "hand", the fitted line just extend to wherever I slide, when in fact I want to truncate the fitting to the range, i.e., I want to leave some empty space between the start and end of the fitted line. I can do that with "Fit Y by X", but not with the nonliner fit function. Am I making sense?