This should be tested on all supported browsers, on all supported Operating systems, as far as relevant (e.g. you can't drag in image file on a mobile browser). So far I have tested Firefox, Chrome and Edge on Windows, which all seem to work. Before you start you need some image files (sample one attached). Test drag drop of one image Go to anywhere in Moodle that supports atto with a filepicker (e.g. start writing a forum post). Drag in the image file. (This was working before, but the code changed while impelementing this feature, so we are testing that there is no regression.) Verify that you see the progress indicator while the file uploads, and then the image appears. Click the View source button ( <> ). Verify that this the image has a URL including 'draftfile.php'. Test drag drop of multiple images (This did not work before, but it does now ) Select several image files on your computer, and drag them into the editor. Verify that you multiple progress spinners, one for each image, and then all the images appear. Select some image files, and some non-image files on your computer, and drag them into the editor. Verify that the images get uploaded, and the other files get ignored. Test pasting images This is what you have been waiting for! Open the image in some program where you can copy it. E.g. open it in your Operating system's photo viewer, and copy the image to the clipboard, or take a screen-grab onto the clipboard. Paste into Atto. Verify that you see the progress indicator while the file uploads, and then the image appears. Click the View source button ( <> ). Verify that this the image has a URL including 'draftfile.php'.