I was flying along the other day and all of a sudden my screen was filled with popups that appeared to show the lengths of all the runways around me which obscured the screen. Which option do I have switched on that does that, I'd like to stop that happening again?

Hi,
if you select Airfields Tab -> Find a destination -> Runway availability,
runway lengths pop up.
I don’t know if there exists a shortcut for this that you activated inadvertently...