Outliner & Hierarchy¶

The Outliner is the tree of what you're about to build in Harmony. Selection here drives the Inspector and the Previewer; the structure here becomes the node graph. It is the mirror of the Structure tree the Blender and Maya exporters author — same levels, same icons.

Toolbar — All / None select or clear every node; the magnify icon frames the selected drawing's node in Harmony; + adds a drawing or structural node; − removes the selection.
Header — the Hierarchy tree column on the left, the Frames count column on the right.
Structural node row — a peg, group, or composite (shown here as a green Peg); other drawings nest under it to form the hierarchy.
Drawing row — the top-level item for an imported drawing (highlighted here as the current selection); driving both the Inspector and the Previewer.
Art layer rows — the four layers under each drawing: Overlay, Line Art, Colour Art, Underlay (top to bottom in z-order); a dash means that layer is empty (unbound).

Rows and their icons¶

Drawing rows are the top level. A drawing's icon is composed from what it emits — Read, Peg, Group, Composite, in wiring order ( a peg over a drawing, the full stack). The whole vocabulary is in the icon legend.
Each drawing expands to its four art layers — Overlay, Line Art, Colour Art, Underlay, top to bottom in z-order. An empty layer is dimmed; the Frames column (right) shows each row's frame count, a dash for an empty layer.
A drawing in Original Bitmap mode shows its three unused layers struck through — only the Recipe layer feeds the flat bitmap (see Bitmap Import).
Structural nodes — pegs, groups, composites — appear as their own rows when you add them ( ), and other drawings nest under them to form a hierarchy.

All / None — select or clear every node.
Magnify — frame the selected drawing's node in Harmony's Node View (see below). Disabled for nodes not yet in the scene.
+ — add a drawing or a structural node (peg / group / composite); or double-click empty space to import.
− — remove the selected node(s).

Building a hierarchy¶

Drag a drawing onto a peg, group, or composite to nest it; drag it between rows to make it a sibling; drag right past the content edge to nest one level deeper, left to un-indent. The indicator draws the exact intent — an indented line for a sibling, a full-row box for a child — before you let go. Art-layer rows are never drag sources or drop targets: an art layer is bound to its drawing and moves with it.

The nesting you build here is exactly the node network OVB writes to Harmony on Apply — pegs transform their children, groups wrap them, and composites merge them.

Sibling aggregation

When several drawings sit side by side under a composite, OVB wires them with sibling aggregation — the youngest sits on the back port, the oldest on the front, so paint order is predictable. A composite with no peg/group opens a block that consumes the normal siblings after it. See Hierarchy & Sibling Aggregator.

Deleting a node¶

Right-click a super node (peg, group, or composite) and you get two delete options:

Delete Node — removes only that node; its children are lifted to the grandparent, so deleting a parent peg re-parents its drawings up one level instead of taking them with it. Your work is never lost to a stray delete.
Delete Hierarchy — removes that node and everything under it — the node, its children, and their descendants, all at once.

Use Delete Node to strip out a wrapper while keeping the art; use Delete Hierarchy to drop a whole branch in one action.

Multi-select also removes a branch

Selecting several nodes across a branch and deleting removes exactly the selected set — the same as Delete Hierarchy on the branch's top node.

Magnify¶

The magnify button (in the Outliner toolbar) frames the selected drawing's node in Harmony's Node View — it centres and focuses that node so you can confirm you're looking at the right node in the scene graph.

Magnify only works on drawings that came from Harmony (nodes that already exist in the scene). For anything created inside OVB that hasn't been applied yet, there's no node to focus, so the action is greyed out (disabled).

Selection is the driver

Whatever is current in the Outliner is what the Inspector edits and the Previewer shows. Selecting an art-layer row solos that layer in the preview; selecting the drawing shows the composite of all its bound layers.