In the Content Editor, click the image you want to resize and note the "handles" that appear on its sides and corners.
Click one of the handles in the area where you want to begin resizing and drag the image handle in the direction you want to enlarge or shrink the image. For example, to make the image wider, "grab" the handle on the right side or left side of the image and "pull" it so that it "stretches" or resizes into a wider image.
