I was very happy when I found out that there’s a key combination that will invert the display of my Mac laptop.

If you press Cmd - Ctrl - Alt - 8, then your screen will change into an inverted state.
See the screenshot for the example.

This is most useful for example when you’ve been using your laptop for hours straight and still need to do so for several more hours, but you fear for your eyes. No worries, just press that key combination, and the display will become more easy to your eyes.

It’s also very helpful in very dim place - sometimes a place is just too dark, even the lowest brightness setting will still hurt your eyes. No longer a problem now; just press the buttons.

And when I need to do that quick SSH session in the middle of the night without waking up my significant other because of the brightness from the screen, this is just the ticket.
No, I don’t do it very often. Honestly.

Happy holiday everyone, hope you find this post useful too.