There is quite an old feature request here:
https://tracker.moodle.org/browse/MDL-47750
Google Docs, GMail and some other mail clients have started allowing users to copy images from a desktop program (paint / powerpoint / word / gimp / fireworks etc...) and paste them directly into the text editor without having to manually save the file and upload it. The same feature would be really useful in moodle.
What do people think? Is this something worth adding to Atto?
-Derek