How do I change the font size of sub label?

(2) How do I change the font size in subfield and in the answers?

Hi,

To change the font size of any specific attribute in your forms, open the form in the form designer:

Once there, click on the CSS tab, then double click on the element you wish to alter:

In this case, I am changing the font size of one of the sub-labels.  This can be done for any element in your form.  You can also single click on an element to apply changes to all of the elements of that type.  If I single click on the sub label in my example rather than double clicked, it would have change all of the sub-labels, not just the selected one.

Let us know if you have any further questions and we will be happy to help.