How can I change the output appearance of the custom fields?



Currently, it kind of looks like the enclosed image. I would like to see the red starred area to be a horizontal layout below the comment. Where and how can I modify this?

Also, I tried changing the "Custom fields" text above field entry form (see red asterisk on attached file). I followed instructions to change it to "Additional Information" via another thread, but it did not work. I cannot find the COM_COMMENT_CUSTOM_FIELDS in the language override editor or in the actual language .ini file. Any suggestions?

Thanks.
Jonathan