I want to rotate my screen contents while physically changing orientation of the screen from landscape to portrait and vice versa. So I created four files and made them executable with contents like

They work when invoked from the keyboard. I want to assign those to KDE global shortcuts using e.g. <Alt><Crtl><left arrow> etc.

How do I tell the KDE settings menu to use the command-(files) I created?

Found it. It's sort of confusing, how KDE solves this.

So, open "keyboard shortcuts" (or whatever it is called in the english GUI ), then select "own shortcuts", there in the second panel from the left on click on "modify". This will produce a popup, select "new" (nothing to modify, but ...), next popup select "global shortcut", next popup select "command / adress". The panel coming up then has three tabs, I ignored comments, middle one is "trigger" (or some such) with default none. Click on it and press the combination of keys you want to use. The right tab "action" has a little folder symbol. Click on it and use the standard file selection menu to select your desired script. Click on "apply".

Phew. Solved. Works like a charm.

Thanks to all readers for their patience and moral support .

<edit> P.S.: Forgot to post the source of all this wisdom , here it is:
https://docs.kde.org/cgi-bin/desktop...ortcut command </edit>