In a nutshell, this would be a kind of reverse advanced merge where you can select which elements of the active show file you want to push into another show file which is not open.I have found the process of building a default show file with my personalized palettes, fixtures, magic sheets, macros etc. to be quite awkward. As time goes on and I hit upon better solutions to various things, if I want to incorporate them into my default file currently I have to:1) note down the identifying numbers of the elements I want to include2) close the active show3) open my default file4) advanced merge in the elements I want to include from the closed show5) close & save the default file6) re-open the working show fileInstead, if there were an advanced save I could:1) save as > advanced would open the advanced file dialog, where I itemize the elements I want to push into the default file. Added efficiency from being able to reference the various tabs to pick out ID numbers. Done and done without interrupting the current work.