Surely this has to be a duplicate as I CANNOT be the only one who has reached his breaking point on this. But I cannot find an existing idea post so....
Please make the default function/property for the Screen object be OnVisible instead of the current Fill property.
When working on apps in Power Apps Studio (aka PowerApps Studio), it is so irritating to be jumping between screens to compare/sync the screens' OnVisible code and have it always default to the Fill formula. How often are people editing/expanding Fill versus OnSelect?
Bonus points if you just make PAS remember the last edited property for each control. But currently there is something in the code that selects which property is the default for each control in PAS, so it should be fairly easy to change it to the more commonly used property.