Everything Enabling Subnodes Disabled subnodes are invisible. To make them visible again, you can enable them in the 3D Graph view. How to enable subnodes In the 3D Graph view, select one or several disabled subnodes. Disabled subnodes will display in dark red, and their children will display in dark grey. Do one of the following: In the 3D Graph view toolbar, click on the Enable Subnode button. Open the 3D Graph view menu and select Subnodes > Enable. The subnode and its children are enabled. In the Camera or Perspective view the corresponding 3D model part is displayed.