Unloads hidden parts from memory. Unloading hidden parts improves performance and can also allow you to build larger assemblies.

If you hide and then unload all the parts in a subassembly, the subassembly listing in Assembly PathFinder is collapsed. You can use the "+" symbol in Assembly PathFinder to expand the subassembly listing. You can also expand the subassembly listing using the Expand command on the shortcut menu.

For more information, see the Working with Large Assemblies Efficiently Help topic.