Shift + Command + W: this shortcut provides an alternative way how to trigger the window-capture option.Grab → Capture → Window: using this option, you can capture a screenshot of a window that you select.Shift + Command + A: this shortcut provides an alternative way how to trigger the selection option.Grab → Capture → Selection: using this option, you can capture a specific region of your screen by dragging a selection box around.Okay, so you have Grab open, configured, and ready, but how do you take a picture of your screen or a part of it? You have several options: To change it back to PNG, open Terminal and type in “defaults write type png” without the quotation marks.To change it to PDF, open Terminal and type in “defaults write type pdf” without the quotation marks.To change it to GIF, open Terminal and type in “defaults write type gif” without the quotation marks.To change it to TIFF, open Terminal and type in “defaults write type tiff” without the quotation marks.To change it to JPG, open Terminal and type in “defaults write type jpg” without the quotation marks.Fortunately, Grab allows you to change the default file format to JPG, TIFF, GIF, and PDF formats. The problem with the PNG file format is that it produces somewhat large files. PNG is the most widely used lossless image compression format on the Internet, and it has a number of advantages over other lossless image compression formats. By default, Grab saves screenshots in the PNG image file format.
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