Confidence interval in Fit Model Actual by Predicted plot
I would like to know how the confidence interval in Fit Model Actual by Predicted plot is calculated. I tried to manually plot Actual vs Predicted with Fit Y by X and the confidence interval is different with the one in Fit Model. I can manually calculate the confidence interval of Fit Y by X but cannot figure out how to calculate the one in Fit Model. Please advise. Thanks a lot!