Image alignment is how the image fits in with the text
In its simplest form, we begin with a simple paragraph and then insert an image in one of the two main ways, either left or right align. Make sure you have at least a few lines of text before the first image! Then Insert the image. The idea is to have some layout variety. If the text is extended, it then goes on to the next line under the picture as is shown here.
Here is a new paragraph, so now we insert the image on the right side.The rest of the text then appears on the left side of the image as is shown here. A theme like twenty-ten works better with its wider main-content area.
Left-Align and Right-Align buttons are the key!
Note in the image below how the right-align button is operated for the right-align image, and vice versa!