Assembly Edit
Assembly Edit turns parts of an assembly library, or single joints in their rigs, after rigging. A common use is a kit whose small parts point a different way from the rest: turn them once here, and every Assembly Decoration downstream places them the right way round. Put it on the wire after an Assembly Resource, or use the Edit Assembly state built into the Assembly Resource. It is on the toolbar's Assemblies menu.
Editing
Press Enter (or Edit (Enter)) to open the state. Click a part, then a joint, and drag the gizmo; R, T, S and A switch it between rotate, translate, scale and all three, and the heads-up display lists the other keys. Edits are stored on the node, and Reset All, under Edits, removes them all.
Assembly Attribute, under Input, is the attribute that tells assemblies apart. Its default, assembly_name, matches what the Assembly Resource writes.
Another way to handle parts that face different ways is to split the library into groups and give each its own Assembly Decoration.
Status
Parts are edited one at a time; there is no box selection yet.
Assembly Decoration
Assembly Decoration places rigged parts from an assembly library along a tree, picks between them with traits, and bends them with effectors.
Assembly Pack
Assembly Pack packs geometry and a skeleton into an assembly, the form the assembly nodes carry on one wire. Natsura's assembly nodes use it inside; you need it only to build an assembly by hand.