Invert Black/White in Mac

I always use my Mac book to play, surf and code, and I prefer lighter background with dark text.

Once I went to a presentation which was inside a small room and people prefer lights-off during presentation. My content was so bright that hurt eyes. Even worse, the text in black was unreadable. During moment like these, a quick and nice solution is to invert the screen colour (White to Black and Black to White).

Of course, you can either go to projector settings or System Preference to do that, but that is too lamb. So, here is the shortcut key to invert the colour:

[Ctrl] + [Alt] + [Mac] + [8]

Being Cool and familiar with your friends (techie tools) is extremely important to attract your audience focus. Prepare some useful shortcuts or coding tricks to stun ~