In our Classifieds they use the term 'multimedia files' to include images, video clips, and sound clips.
If you need to delete an image in your ad, follow this procedure:
Log in and click the 'Edit Ads' tab in the top menu. Then click the 'Add/Edit Multimedia Files' button. This will take you to the 'Multimedia Manager' page. Then click the 'Delete Multimedia File' button.
You will be prompted for the Ad Number in a form that appears. Enter the ad number of your ad that contains the image(s) you want to delete and then hit the 'Display Multimedia Files Associated With This Ad' button.
A list of with your images will appear. Check the ones you want to delete and click the 'Delete Checked Multimedia Files' button at the bottom.