The ROS Wiki is for ROS 1. Are you using ROS 2 (Dashing/Foxy/Rolling)? Check out the ROS 2 Documentation
Users are highly discouraged from using the documentation and tutorials for Gazebo on this page. Gazebo is now a stand alone project at gazebosim.org. See documentation there, thanks!
Wiki: gazebo/InteractingWithGUI (last edited 2013-05-24 01:15:09 by davetcoleman)