Explain and send screenshots is a dead simple and extremely useful screenshot taking extension for Google Chrome. With this extension you can capture any part of a web page, add arrows, lines, circles and text and then share it directly on Twitter, Facebook or MySpace or send as an email attachment.
After you install Explain and send screenshots, click on the new icon which appears on Chrome’s toolbar.
Make a selection using the mouse.
Then you can copy the image to the clipboard or send the snapshot as a link in the body of an email or download the image onto your desktop or even share it on Facebook, Twitter or MySpace.