Screen Capture Command on Mac

Better screen capture

(This article was intended to be written on 18th Sep 2016, but actually written on 8th April 2017)

In order to take a screenshot on Mac, the standard way is to the Grab application.

Keyboard users often get used to these.

⌘ + ⇧ + 3  - full screen which generated a file on Desktop
⌘ + ⇧ + 4 - capture custom dimensions using the mouse.

I recently discovered that screencapture command is part of the OS X. I happen to have the need to paste a screenshot in a chat (in the current world, input boxes or gmail compose allows you to paste an image inline without the need to have a file on disk)

screencapture: illegal option -- h
usage: screencapture [-icMPmwsWxSCUtoa] [files]
  -c         force screen capture to go to the clipboard
  -C         capture the cursor as well as the screen. only in non-interactive modes
  -d         display errors to the user graphically
  -i         capture screen interactively, by selection or window
               control key - causes screen shot to go to clipboard
               space key   - toggle between mouse selection and
                             window selection modes
               escape key  - cancels interactive screen shot
  -m         only capture the main monitor, undefined if -i is set
  -M         screen capture output will go to a new Mail message
  -o         in window capture mode, do not capture the shadow of the window
  -P         screen capture output will open in Preview
  -s         only allow mouse selection mode
  -S         in window capture mode, capture the screen not the window
  -t<format> image format to create, default is png (other options include pdf, jpg, tiff and other formats)
  -T<seconds> Take the picture after a delay of <seconds>, default is 5
  -w         only allow window selection mode
  -W         start interaction in window selection mode
  -x         do not play sounds
  -a         do not include windows attached to selected windows
  -r         do not add dpi meta data to image
  -l<windowid> capture this windowsid
  -R<x,y,w,h> capture screen rect
  files   where to save the screen capture, 1 file per screen

screencapture -c -i

solves most of my needs to capture interactively with output into the clipboard.

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