I had to take an extended break from these courses due to work commitments so I may be missing the obvious as I do not use rviz much but this seems vague and not sure what I should be doing. At the very least seems like this should be pointing us to documentation to refresh our memory.
“And the rviz window pops after some seconds. The first time it will not have anything, so add the necessary elements and save you Rviz config file in the rviz_config folder with name
launch_part.rviz. Then, compile again and relaunch. You should see the RViz open with your saved configuration.”
The window pops up but nothing I do seems to be getting me to what is shown on the animated gif.