Control-Command-Shift-4

I'm a big user of "The Secret Screen Capture Shortcut" Control-Command-Shift-4, which give a cross-hair cursor and copies a selected part of my screen to the clipboard. What I've noticed, however, is that it doesn't seem to be "lossless!" When I paste images made using this shortcut into Photoshop, especially when "tiling" multiple images, I've found that i get some pixel-shift, and parts can be off-kilter by perhaps a half-pixel. To remedy this, I am now sticking to full-screen captures and doing all my cropping in Photoshop. If anyone has an explanation for this, or knows of a "better way" of capturing an area of the screen WITHOUT LOSS, please post!

Thanks,

~Rob

G5, Mac OS X (10.4.9)

Posted on Nov 26, 2007 11:46 AM

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8 replies

Nov 26, 2007 1:55 PM in response to Rob.Blaze

Hi Rob.Blaze,

Just to note, holding down the Control key does nothing extra. Command Shift4 is all you need. One thing on that which is extra, after pressing Command Shift4, then press the spacebar and you can take a shot of any window without having to draw a marquee around it.

The default file for screen shots is PNG (Ping). It's nowhere near as bad as JPEG, but is still a lossy, compressed format. To change that choice, download and install OnyX. Make sure to grab the right one as the author has different downloads for Tiger, Panther, etc. Run the app and click on the Parameters tab. You'll see a drop down menu about the middle right for "Format Screen Capture:". Change it to TIFF to get a lossless format.

Nov 26, 2007 2:15 PM in response to Rob.Blaze

Hi Again Rob!

It's an extra step, but if you use the Command + Shift + 4 keys, to create a png file on the Desktop, as I previously posted, another method of converting the png file, is to, open it in Preview, and from the File contextual menu, select Save As...".

In the window that appears, for Format:, select TIFF, or any of the other choices, which include Photoshop.

ali b

Nov 26, 2007 3:44 PM in response to Rob.Blaze

Hi, Kurt and Ali (and Rob). Every time I use the Command-Shift-4 key combo on my Tibook running OS X 10.3.9 — which is often — it gives me a .pdf file, not a .png. I have no recollection of having changed any default setting for this, and I really prefer to get .pdfs instead of .pngs, so I'm not complaining. I note that you're all running Tiger. Did the default screenshot format change from .pdf to .png between Panther and Tiger?

Message was edited by: eww

Nov 26, 2007 4:27 PM in response to ali brown

Hi ali

Just a technical note. If you start with a lossy image (.png) and save it as a lossless image (.tiff) that will not restore any jaggies to smooth, rather it will just preserve what it is given, such that any future editing and saving of that new format will be maintained as lossless. It will not reverse the compression process used to create the lossy in the first place.

Hi eww

I am still with Panther as well. For those with Tiger (or Panther) who may wish to change the format of the Grab, it is possible using Terminal;

defaults write com.apple.screencapture type .pdf



Also able to use .jpg if you wish. You need to log out and log back in again for the command to take effect.

regards roam

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