What does Fn + Spacebar do?

[lookingatlenovo]

I have never seen Fn + Spacebar do anything, is it broken? It looks like it should magnify, judging by the magnifying glass on the Spacebar, yet I have never seen it do anything. Does it only work with certain applications or what?

[davidhbrown]

When I press it, a dialog appears:

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[[icon] Full Screen Magnifier in Multi-Monitor mode       [x]]
Would you like to move the active
window from your primary display to
your secondary display / projector?


[] Do not show this again               [  Yes  ] [   No   ]

If I click "Yes", a different dialog appears in the bottom-right of my primary monitor:

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[[icon] Presentation Display Controller       [__][[]][x]]
Magnification                Brightness (gamma)
  (menu)                           (slider)

[Options]              [Exit the presentation of the window]

And this window was moved to my secondary monitor, filling the screen. (I'm docked right now, with my notebook's screen as a secondary display and a larger desktop monitor as primary.)

The very few times I make a presentation, I usually have some trouble figuring out whether I need to drag a window left or right to get it to appear on the projector. PowerPoint itself has some built-in smarts about external projectors, but for bringing up other applications, I guess I can see where this could be a time-saver.