When working with several project files that you’ve opened in separate windows, you might decide that it would be more convenient to work with those files in one window, as a consolidated project. If that’s the case, you can consolidate the open project files all at once, without having to insert them one at a time. Microsoft Project automatically creates a consolidated project file for you.
When consolidating open project files, you can specify which of the open projects you want to consolidate. You can’t specify the location or order of the inserted projects in the consolidated project file, although you can do so afterward.
With this method, the inserted projects are automatically linked to their source files. You can’t unlink the files from their source files as you consolidate them, although you can do so afterward.
To consolidate open project files