Thank you very much for your time and sharing these additional details, Rick, I really appreciate it! I reviewed your article on how to slice the regression surface - I think this may be more advanced than what I am trying to visualize. I am hoping to visualize my multivariable regression model, with the inclusion of splines for my primary exposure of interest. To achieve this, would it be appropriate for me to create scoring values for each of my model covariates as you show above, and then plot the fitted curve using proc plm and sgplot?