MS Office Tip: Black out your Powerpoint Slideshow this really is a top tip. If you’re doing a PowerPoint presentation (I know that it’s pretty much like handling the wand of satan, but lots of us have to do it), and you want people to stop staring at the screen like ritalin-laced teenagers whacked out on MTV. Just hit B, the screen goes blank. hit B again, the pres comes back. Simple, but useful. Like the site I pinched the tip from – Lifehacker