How to enable the new editor
To enable the new editor, first navigate to your blog's Settings | Basic tab. Near the bottom of the page you will see a field called Select Post Editor, and from there you simply need to select Updated Editor and save your settings. That's it! Now on to the new features...
Improved Image Handling
When you upload an image to the new post editor it will appear as a thumbnail in the image dialog box. That way, you can upload several images at once, and then add them into your post at your convenience. The thumbnails will be available until you close the post editor.
When you add an image from the dialog into your post it will be placed at the insertion point instead of at the top of the post.
If you don’t like where an image is in your post, you can drag it around to another spot. If you drag it towards the left side of the editor it will float to the left, likewise for the right, and if you leave it in the center it will be centered. You can drag the image between paragraphs and other block elements. Unlike in the current editor, dragging in the new editor preserves the link to the full-size version of the image.
