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.
OneNote Web Clipper Alternatives
OneNote Web Clipper is described as 'You're busy. OneNote Web Clipper lets you quickly clip all or part of a web page to OneNote, and save it for later. Clip images, pdfs, videos, or a visual bookmark of a page. Best of all, you can access them from any computer, tablet, or phone - even when you're offline' and is a screenshot capture tool in the photos & graphics category. There are more than 100 alternatives to OneNote Web Clipper for a variety of platforms, including Windows, Web-based, Mac, Google Chrome and Mozilla Firefox apps. The best OneNote Web Clipper alternative is Raindrop.io, which is free. Other great apps like OneNote Web Clipper are TagSpaces, Obsidian Web Clipper, Instapaper and Snagit.




