Qt: how to make an invisible hotkey?

Question

User interface

Often there are hotkeys that are so famous that even a menu item is not needed for them: for example, “Continue Search” (F3) or another version of the “Copy” command (Ctrl + Ins).
How this was implemented in Delphi: they created another TAction, set a key, and off they went!
How to do the same in Qt? QAction, if not in the menu or on the panel, then it does not work.

Answer 1

Understood.
doc.qt.io/qt-5.6/qshortcut.html