Provides an opaque background for [Control] children. Panel is a [Control] that displays an opaque background. It's commonly used as a parent and container for other types of [Control] nodes. $DOCS_URL/07_demo_projects/2d/role_playing_game DOCS_URL//07_demo_projects/2d/finite_state_machine $DOCS_URL/07_demo_projects/3d/ik The style of this [Panel].