I'm really sorry, I know this is a basic question, but I wanted to ask what the best way is to have multiple people working in one project? At the moment we have the entire building in one file using all the standard layers and classes and it all links up to complete 3d model. Up until now, its only been one person on the project and we have most of the set all worked out. We now are adding another person and don't know how to split up the file so both can use it without destroying the organization that is currently there and without destroying our 3d model capabilities. Any success with this? I appreciate any avenues that you can lead me to. Thanks.