I followed the instructions on adding the line using the XML Panels and, although it is a strange solution, it actually worked!

Thank you very much.

Hello, I have a physical disability that prevents me from using a joystick. Currently, I am a Xplane user and use a virtual joystick I developed using Vjoy/Freepie. The mouse xy coordintes are translated to joystick positions. To check where is the middle of the screen, and therefore center my virtu...