• cmd+shift+3 to dump the whole screen
• cmd+shift+4 to select an area of the screen (then press space for a whole window).

However, there are times when the above won’t do. Typically, it’s when you’re already pressing keys to get the image you need — the key chord cmd+shift+4 isn’t going to work if you’re already holding down alt for example.

That’s where grab comes in — it’s what Mac users used before cmd+shift+3/4 came along, it’s still there, and it can dump the screen after a ten second delay.

So, start up grab. I use Spotlight to do that, so I type cmd+space grab:

Then, to do the delayed screen dump, select Timed Screen from grab‘s Capture menu:

You then have ten seconds to set up the screen as needed, and grab does the rest.

Then select File->Save As… to save the resulting tiff file, and you’re done.

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