By default the Residuals by Predicted and Residuals by Row plot the absolute value of the prediction error. A great enhancement would be the ability to show/toggle the relative %error = residual/actual. This would allow for a visualization of "is the model error within my measurement error?".
Example below is from fitting liquid propylene density to temperature. My density instrument is +/- 0.5%. I computed the %Residuals in formula columns. Run the Predictions & Residuals script