Scenario: I have a URDF where I have defined information about the robot.I have defined cameras on the robot, but geometry is pretty simple(a box). I wish to select each camera and be able to more inside gazebo without really restarting gazebo again. Behavior: I cannot see the links and joints if the joint type is "Fixed". I can however, see the prismatic and continuous joints. Since cameras are fixed joints, there is not way to select them. If I try to click on it, it selects the entire robot.The same behavior is not seen with an SDF. I have a different SDF file, and when I run it, I can see each joints and links no matter what the joint type is. I am wondering if its a Gazebo thing or am I doing it wrong.