With the ability to add so many references, it would be helpful to have the ability to organize them better. It would be useful to group similar references together in a folder within the reference window. Example being; all utility references in one folder, all proposed surfaces in another, all bridges in another, etc.

You could do this using a main master file with separate master files for each category and live nesting, but it would be a simpler workflow to have a folder option in the reference window.