Groups
The Groups panel with two groups added to the selected objects: moving platform and half opacity
The Groups panel allows you to add and remove groups from the selected objects.
As opposed to Geometry Dash, groups have names, which can be any text[1].
The Group Parent property tells the gizmos to set their center to the object you enable it. If there are multiple Group Parents in a selection, Godot Dash will pick the first one. In order to avoid any confusion, try to only have a single one in your selection.
Groups use Godot's group system under the hood ↩︎