If you have a table with a large number of items (sub-questions), it is advisable to repeat the title bar (header row). To do this, create a table question first: in the 'EDIT' - 'Questionnaire' tab, select your desired table type from 'All Question Types' in the menu on the left or via the 'Add question' button below the questionnaire.
Once the table is set up, the question settings will open on the right-hand side. In the 'Answers' section, there is a setting called 'Repeat header row'. In the drop-down menu, you can choose to repeat the title bar every 5, 10, 15 or 20 rows.