Since Visio is now warning us when we have files that have more than 10-pages and most of our larger projects require more than 10 pages, we have started breaking out our drawings into three files. Plans, Schematics, and Elevations. This can be cumbersome when making modifications on a device plan, but need to also adjust the elevations since after we make the change in one file, we must close the first file, then open the second file, make the change, then return to the first file. If we could have both files open at the same time and be able to edit both at the same time, it would make this so much easier.