I have scanned a hundred one-page surveys. The files now exist as individual PDF, however without any form fields. I now wanted to use the "Extract data from scanned file" function define where the checkboxes are that need to be extracted. However, I am only able to define text-fields and not checkboxes or anything else (see attached pdf). This however creates almost unusable results when extracting the data because the software converts the checkbox and a possible mark into text. How do I get values such as "checked" or "unchecked"?