Export csv column

Hello, good time, does anyone know how to output the content of several columns in one column?

Hello Saeed. You can use the gform_export_field_value() filter for that:

Hello, thanks, I just don’t understand where should I use this?

The code you write to use that filter will go in your theme functions.php file or a custom functionality plugin. See this article for additional information about adding PHP code to your site:

Thank you.