How to display 2 fields in one row?

Here are some guides that will help you to display fields in multiple columns: 

How-to-position-fields-in-JotForm

Form-field-positioning

You can achieve it by injecting CSS code to your form as well, here is a code that will help you to achieve the same: 

.form-line:not([data-type="control_button"]){

    width: 48%;

    display: inline-block;

}

This guide will help you to inject the code to your form: How-to-Inject-Custom-CSS-Codes

Fields will be displayed in two lines as soon as you inject that code to your form, take a look to my sample form: https://form.jotform.com/61654653437966 

Feel free to clone it.