I am not able to format the font on my Calculated Value controls in NINTEX forms, attached to my SharePoint 2013 list.
I also do not see the CSS Class options.
Is there a setting in Nintex or SharePoint that could be preventing me from being able to apply different formatting?
In the form you have a CSS heading that you can then post your CSS inside. To reference a form control it should start with NF_
Take a look at these https://help.nintex.com/en-US/nintex2016/sp2016/Forms/Designer/CSSStyles.htm