The Quadcopter example model opens a "Simulation 3D Animation Viewer" with the Simulink model. Navigate to File>Open in Editor option to open "3D World Editor ". This editor allows us to change the positions of various components and their children nodes. You can change the center location of QuadBody node to start from free fall and run the simulation to see the results. Please change the values of other nodes too (if needed) to get the required results.