Project Structure
The entire structure of a project can be displayed and edited in the project structure tree.
The project structure tree is used for building and presenting the calculation structure in a structured BoM format. The project tree structure allows you to work on different types of data clearly arranged in manageable units.

Figure: Project structure tree
The project itself is always presented as top element in the project structure and is identified by the project name.
This is followed by extra charges and the top-level assembly.