Groups are used to keep complex node trees organized. You can select any number of nodes in the node tree and then group them to create a single node icon in the Node Editor. Groups are non-destructive and can be opened at any time.
To group nodes, select them in the Node Editor, and then right-click over any of the selected nodes and choose Group from the contextual menu.
To edit the individual nodes in a group, right-click and choose Expand Group from the contextual menu. All individual nodes contained in the group are displayed in a floating node tree window. When opened, groups hover over existing elements, allowing editing of the enclosed nodes.
To remove or decompose a group and retain the individual nodes, right-click the group and choose Ungroup.
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