How to find out what command is being executed at the moment the graphic button is pressed in Linux?

Question

linux

I have Linux Mint 20.
I want to assign my own hotkeys.
To do this, you need to know the command that is executed in the case I need (for example, creating a screenshot with a third-party utility).
How to properly monitor it? How can I find out what commands are called by pressing a graphic button in a third-party utility or even in the system settings? Events are logged somewhere?

Answer 1

Desktop entries

Answer 2

peek has a CLI!