And i wanted to do something useful for other keys and apps, for example highlight buttons related to Ctrl, like saving, copying and other actions. I'm able to create needed profile but i have no clue how to activate this profile in right way. The only available way is to assign lightning profile in:
Keyboard -> Customize -> <Press Ctrl button> -> Switch lightning.
But it fully switches profile and there is no way to switch back to previous lightning profile when releasing button, like it is hardcoded for FN key. Also switching between profiles in this way produces very long transition effect and reassigning key action for Ctrl, actually removes it's original capabilities of Ctrl button.
So my question: Is it possible to do effects for Ctrl or other buttons with behavior close to FN button in Chrome Studio?

