Hi @FIN_TKG, welcome to the forum 
QGroundControl is not particularly well set up for adding arbitrary visual components that aren’t already built in. I’ve previously discussed adding a sensor reading to the display (from before I was working at Blue Robotics), but that had several steps involved and was just to show a single new number in the existing telemetry widget. Adding custom components like graphs and shapes would likely be much more work, and would need more direct consideration of the QGroundControl development process.
Out of interest, what are you trying to display that isn’t already available through Ping Viewer?