You will be able to find the trees panel as one of the four main panels that can be opened on the top right of your screen. You can either press the tree icon to open this panel or you can press shift+3.
The "IFC tree"
button has to be activated to see the tree structures for the IFC models. This structure is imported from the IFC file. The tree structures shows us where a selected object belongs in the model.
The containment tree provides a hierarchical perspective on how the different IFC objects relate to each other.
The component tree provides a hierarchical perspective on the components that make up an object.
In this tree you will be able to find components like:
The type tree shows all the objects sorted by their type.
The layer tree provides a hierarchical view of the layers in the model.
The system tree provides a view of the systems in the model.