A year back, Gmail started letting users drop images from their desktop right into the compose window.
"Now, when you are running the latest version of Google Chrome, you can paste images right from your clipboard too," Google announced.
"So if you copy an image from the web or another email, you can paste it right into your message. This is especially handy for passing around screenshots -- you don't have to save the files any more (I have been using Command-Control-Shift-4 on my Mac to save screenshots directly to the clipboard). While this currently only works in Chrome, we hope to enable it on other browsers soon," Google added.