@rose_b when you click on gear icon on left there is option "add default choices" there change 0 with one blank " ". It will solve.
Hello
@rose_b ,
This can be achieved through java script.
1. Get the id of the input box- In the preview mode of the question, do inspect element(ctrl+shift+C for chrome) and get the id of the input box (marked with arrow).
As shown in the below image!
2. Go to the add java script option of the constant sum matrix question and add the following line in the on load function :
document.getElementById('QR~QID9~1').value="";
3. Repeat step step 1 and 2 for every input box. see the image below
!
4. Once this is done you will see blank input options as shown in the below image
!
Please let me know if you have any problem in implementing this.
Thanks
@Shashi 
That did the job.
@bansalpeeyush29 - when I tried your solution it showed the " " in the response box - I may have been doing something incorrectly though!?
Thanks both
Rose
@rose_b only blank space no quotes"
@rose_b,
While the solution given by
@Shashi works, that is really the hard way. The following is one line and you don't have to look anything up.
```
Qualtrics.SurveyEngine.addOnload(function() {
jQuery("#"+this.questionId+" td input[type=text]").val("");
});
```
