Reference for Selection Tree Window

Icon	Description
	A model, such as a drawing file or design file.
	A layer or level.
	A group, such as a block definition from AutoCAD or cell definition from MicroStation.
	A composite object, which is a single CAD object that is represented in Autodesk Navisworks by a group of geometry items.
	An instanced group, such as an inserted block from AutoCAD or cell from MicroStation. If in the imported file the instance was unnamed, Autodesk Navisworks names the instance to match its child's name.
	An item of geometry, such as a polygon.
	An instanced item of geometry, such as an instance from 3D Studio.
	A collection. It is a series of items within a Revit model, which may include any other geometry such as groups, sub-groups or instanced groups. Collections are visible in the Standard tab.
	Saved selection set.
	Saved search set.