Under the Inline edit mode, select any image on the page and click, it will popup the edit menu on the right for you to edit the image. There are four options: Edit link, Edit image, replace with text and Direct to this page.
Copy This Block
By clicking 'Copy this block', you can easily copy the image on your page.
If you don't like the image, you can click 'Delete' to remove the image.
Edit image allows you to change the image or modify the alt and title information. You can also change the image size.
Replace With Text
The 'Replace with text' option allow you to remove the image and use a text to replace it.