Hi Gaetan,
this is because all your objects are defined as Group nodes, and these do not have the capability to change position or rotation. To be able to change position etc., you need to change these nodes to Transform nodes.
Probably the easiest way to do this is to close your model and open the WRL file as text. You will see something like "DEF Drone Group" for all the Group nodes in the virtual world. Change that to "DEF Drone Transform" for all the nodes you want to move and save the WRL file. Then open your model again and the translation, rotation, etc. fields should be there.
Good Luck, Jan
