When you are in the editor, you can simply start by clicking into the the area of the text you are wanting to insert a picture. Then, click on the image icon and paste your images URL. Toward the bottom, there will be a dropdown field where you can set the Alignment. Choose left or right to Position the image. An lternative method: if you already have an image in place, you would simply right click on the image, select Image Properties, and change the alignment. The snippet below shows a similar process, but starts out by clicking on the Images button. Hope this helps.
