Here in this guide, yow will see how to change the font size/colors. Follow the below instructions to achieve this.
The different text elements in the form can be changed in font type, font size, weight, colour and alignment. Head over to the design section and typography.
Here you see the tabs for:
Question Title
Question Description
Input Box
Input Box
Text Element
Go to the tab of the text category you want to edit and you can make any changes to font type, font size, weight, color and alignment.
Hit “Save” to keep your design changes.