The image shown on the left hand side of a Summary is taken from the Details rich text field. By default, the first image found in the Details section will be used as the Summary image. If you do not want any particular image used, select the Advanced tab in the Image properties dialog, and in the Stylesheet Classes box add the phrase "noshow". If there is no Image found, or if all Images are marked "noshow", no Summary image will be shown. If you only want the Image to appear next to the Summary, but not in the Detais field, select the Advanced tab in the Image properties dialog, and in the Style box add the phrase "visibility: hidden;" .