GNOME Screenshot is described as 'Utility used in the GNOME desktop environment for taking screenshots. It was part of the GNOME Utilities (gnome-utils) package, but was split into its own package for the 3.3.1 version in 2011' and is a screenshot capture tool in the photos & graphics category. There are more than 50 alternatives to GNOME Screenshot for a variety of platforms, including Windows, Mac, Linux, Web-based and Google Chrome apps. The best GNOME Screenshot alternative is ShareX, which is both free and Open Source. Other great apps like GNOME Screenshot are Greenshot, Ksnip, PicPick and Snipping Tool.
You grab Screens or Windows using the standard PrtScn and Alt-PrntScn keys and MGrab will intercept the saved data as it is sent to the clipboard and put it into your chosen folder as a BMP or JPG file leaving the clipboard free for you to take another screenshot.
