Some of the built-in Portlets come with attached images, such as the “My Links” image on the Favorites Portlet. How can I turn these images off?
You can overwrite the image file with a one pixel transparent image. All Portal images are stored in the /images virtual directory on your server. Find out the name of the image file you want to overwrite. (For example, you can right-click the image in Internet Explorer, and select Properties). Copy the file /images/pobtrans.gif (a 1-pixel transparent image included with Oracle9iAS Portal) to the filename of the selected image. (Make sure you back up the file or your images directory first). Similarly, if you want to supply your own image, copy your custom image file to the selected filename.