System-wide reverse scroll

[notFranco]

Hi everybody, first of all - I'm totally new to LXDE world, so bear with me and try to explain things in the most basic way

I've recently used the Xmodmap method to add reverse scroll on LXDE (I'm on openSUSE Leap 42.3 if it matters). The only problem is that it works only on some applications, for example while browsing Firefox or editing on Leafpad. When I use other apps like Telegram or any kind of system app (YaST, terminals, LX Control Center and so on), it scrolls the opposite (default) way.

Is there a way to extend it system-wide?

[drooly]

https://duckduckgo.com/html?q=linux%20r ... ystem-wide => https://ducfilan.wordpress.com/2016/09/ ... ntu-16-04/

[notFranco]

Fortunately I still know how to Google stuff and tried most of the things your search linked to. But every method gave the same result. Reverse scroll works in some apps and doesn't in others. I wouldn't asked directly here if a search solved the problem.