How to write the added text

Hello.

I looked in the admin folder and found the file you quoted:

If you would like to have this as a default behaviour go to yourblog.com/wp-admin/options.php and search for image_default_link_type. Set the value to file and hit save. This will apply to all new Image & Gallery Blocks.

But how do I place “file” into that string, is there a specific way of writing it. When I removed the “type” part and replaced it with “file”, nothing happens!

Thank you.