Hi @alexdubbb,
In reality your question is ambiguos. What do you mean with custom field value?
In the plugin, each field has a field name with the structure: fieldname# (fieldname1, fieldname2, …)
If you want to add the values of two fields, for example, fieldname1 and fieldname2, insert a calculated field in the form and enter as its equation:
fieldname1+fieldname2
But what happen if you want to assign the value 10 to the number field fieldname1, from an equation associated to a calculated field?
– Assign a class name to the fieldname1, for example: my-field
– and then, the equation associated to the calculated field would be:
(function(){
jQuery('.my-field input').val(10);
})()
Best regards.