You can
unload objects that are no longer used in the session. Unloading objects from an assembly or a system enables you to keep in session only those objects you need and frees up memory.
Important:
The unload operation cannot be undone. To reload unloaded objects, reopen the data.
The unload operation deletes the history of all finished actions. Therefore, you cannot undo or redo actions after unloading objects, even on objects that are kept in session.
You cannot unload a root object from the tree.
Because there is only one memory for each session, the selected objects are unloaded from all
editing tabs. It is also unloaded from a Co-Review or from a Product Finder, if any.
Before you begin: To avoid losing modifications, save the objects before unloading them.
Select an object.
To confirm the unload operation, click OK.
The object and its children are unloaded and no longer displayed.