These functions are members of class input_frame. 6.13.10.2.24.1. Headings 6.13.10.2.24.2. Paragraphs 6.13.10.2.24.3. Citations 6.13.10.2.24.4. Tables 6.13.10.2.24.5. Lists 6.13.10.2.24.6. Fonts 6.13.10.2.24.7. Displays