When transferring project standards, one must first make sure that either all the projects are open in a single instance of Revit, or that they are linked into the project into which the standards must be transferred into. Do not forget that links may be used to transfer project standards from. Otherwise one will spend a lot of time opening files that should not be opened in the same instance of Revit.
Those that are used to editing externally referenced drawings in the container in AutoCAD are usually frustrated when first using Revit. If that is what one would like to achieve, then open a second instance of Revit. Open the link in this instance of Revit and then make the required changes and save. Go back to the other instance of Revit, and reload the link
If you are working on a large project, make sure you have enough RAM.
If you need help coordinating Revit files or if your hardware needs upgrading, please contact Micrographics so we may be of assistance to you.