Since I can't take screeshot from Programming picture for illustration.
As mentionned to Pedro within forum, while trying to program flight automation, I can't set any variables. For Exemple On start -> Activate Stage -> Wait Until (Altitude (AGL).... There's no bubble to set a number or anything like that as seen in some forum post. And that's where it fail, I can select which king of altitude but not desired one for exemple Altitude (AGL) 5000.
@pedro16797 found it later sorry. It seems that Vizzy has been reworked since last time I used it few month ago