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I know Cmd+Shift+4 is how screenshots are normally taken of visible areas on Mac OS X, but this shortcut does not work during a Keynote Presentation.

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OS X has a command-line tool called screencapture that makes a screenshot. Try this:

  1. Open Terminal
  2. Type screencapture -T 5 -t tiff ~/Desktop/screenshot.png (the "-T 5" option specifies a 5-second delay; the "-t tiff" option specifies saving the data in the uncompressed tiff image format)
  3. Hide Terminal and return to Keynote within 5 seconds

With a full-screen screenshot, you can use the crop tool in to save the region of the screen that you want.

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This is useful but I want to keep the high resolution of the graphics I used on the presentation. Do you know how to take screenshots on secondary displays? Thank you! – aimango Feb 3 '12 at 22:51
You can save the screen capture in an uncompressed tiff format by using the option "-t tiff". I'll edit the command above to include this option. Regarding secondary displays, I don't know for sure and I can't test it right now, but the man page (accessible by typing "man screencapture" in Terminal) suggests that all of the available screens will be captured. But I don't understand how that works since only one filename is provided on the command-line. – bneely Feb 3 '12 at 23:34
There's a GUI for that functionality called Grab in /Applications/Utilities. – deceze Feb 4 '12 at 2:35


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You can export a Keynote presentation in a number of formats, including jpg, tiff and png–no need for screenshots.

+Shift+4 snaps a picture of te selected portion of a screen, +Shift+3 is the shortcut for a full screenshot.

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Good to know, thanks. I also found out that if you are connected to a secondary display, Cmd Shift 3 takes screenshots of both displays at the same time so you end up with 2 pngs. – aimango Feb 4 '12 at 0:00

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