When you create a garbage mask, an Axis node and a Geom node are added to the schematic. If you want to view the nodes, select Schematic view or press ~ (Tilde) to toggle to Schematic view.
The Camera node is always part of the scene. The Axis node contains rotation, scaling, position, and centre data. The Geom node contains information about how the mask will affect the image (softness, opacity, alpha, axis offset). The Camera node can parent the Axis node for greater precision over the garbage mask, particularly if you want to rotate or orbit the camera with respect to the garbage mask.
(a) Axis node (b) Geom node
You can double-click an Axis or a Geom node to view its related menu. You can delete a garbage mask by deleting its Geom node from the schematic.
For more information on working in Schematic view, see Using the Schematic and Menu Tabs.
