If you click on Default Choices, then you can type in “no response”

Assuming this question is for text entry question type. We can make use of default choice or use JS to set the empty text entry boxes with no response text in on page submit function.

thank you for your help. I should add that I dont want to be doing this replacement of blank fields manually. And this is for non force multiple choice question

Are you referring to what you export the data? You can export seen but unanswered fields as 0 by selecting the Data Export Options - you can even change the 0 to another value. I’ve never tried using a non-numeric value before, but it might work e.g. 

p.s. or adjust the option above ie. the Recode seen by unanswered questions as -99

@MikeW that is useful to know for the export function What about being able to see the seen but unanswered question in dashboards and for example report satisfaction on the graph for those who seen but not answered the question?

Thanks for your response, I am not very technical, not sure what JS I would need to use and would this work for multiple choice (not forced) questions?