Libraries seems to be the one area of Vectorworks the cause the most confusion. It seems that users are confused about their own Vectorworks library, where they should store parts of it, and where the best place to store all their information is. It is tempting to think that you only need to have one library file that you can put all your resources in there. However this is not how Vectorworks is set up.
Vectorworks has a system called Default Content. This default content automatically turns up when it’s needed. For example, hatches have their own location in your Vectorworks User Folder. Storing your hatches in this location will mean that when you apply hatches to an object they will automatically appear on the Attributes palette. This makes your default content very powerful, but you must store the information in the correct locations.