Click on the "Categories" link to see the list of categories or click on [Modify this list] at the bottom of any Categories list in a job assignment pane. The master list of categories will appear. Simply uncheck any category that you do not wish to appear in your resume. All checked categories will appear on the menu at the left in the resume. Unchecked categories do not appear on this list nor will they appear in the Categories list in each of the job assignment panes.
Be cautious that you did not use any of these categories in any of your job assignments. Unchecking a category will cause these entries to disappear from your job assignments. Rechecking the category will restore them, however.