same line for columns

on your faq page you say the following but I cannot see where to put this. I don’t see a ‘add css layout keywords’ on my page https://prnt.sc/1xbq2oy

Q: How can I align the form using various columns?
A: Into the form editor click a field and into its settings there is one field named “Add Css Layout Keywords“. Into that field you can put the name of a CSS class that will be applied to the field.

There are some pre-defined CSS classes to use align two, three or four fields into the same line. The CSS classes are named:

column2
column3
column4

For example if you want to put two fields into the same line then specify for both fields the class name “column2“.`