To edit an existing bookmark or set, go to the main or full view of the bookmark portlet by clicking on the Go to Main Screen link in the bottom right corner of the bookmark portlet or by clicking on the title of the portlet. (My Bookmarks, if you are on the main page of your My Pages tab.) This will take you into the Edit View of your bookmarks portlet.
Your bookmarks will be displayed by set, with a checkbox by each bookmark. Each bookmark will have a
(Edit) icon and a
(Delete) icon. In addition, each set will have a
(Edit) and a
(Delete) icon.