If they are all in the same RGB_Effects file then all you have to do is make another preview in the layout window. I use Default for my front yard and "SideYard" for the side yard since to put everything on one screen makes stuff way too small for me. On the model data screen you just change which preview the model is in. One catch is that there is only one background image and that goes into default. If you are looking at doing something for next year I would just make another folder and copy everything in to it and then delete what is not needed like fseqs, render cache, backups, etc. Or you just copy the files that start with "xlights_" then you truly have a totally clean slate.