Use prior ortho as basemap

I’m using Pix4D to track progress on a large roadway construction project. I’ve created the “before” ortho of the entire site, about 6 miles of roadway in total. The contractor won’t be working on the entire project at one time, so I’d like to focus future flights on the areas being worked to reduce processing time. I know that I can use compare to conpare the new new orthos to the pre-construction, but Cloud will only allow an old satellite or a street map as the background. It would be nice if we could overlay the new ortho directly over another dataset’s ortho rather than just side by side compare. Is this possible? I could export the orthos to Google Earth and do it there, but that defeats the purpose of this.