This article applies to Website Builder packages.
Once you have placed your image in your website design you may want to re-size it so that it fits better within the design. To re-size an image:
Scroll down to the Create your website section and click on the Website Builder icon.
Click on the Login button next to the relevant package.
In the Design view use the mouse to click and highlight the image you wish to re-size.
Choose one of the white rectangles highlighting the edges of the image. Click and drag to change the size of the image. The image will re-size in proportion to the original dimensions unless you first de-select the change the Aspect Ratio option in the image properties.
article for details on how to change the aspect ratio.