Extrafield Project Layouts

Hi, I purchased JA-Decor and I can't change the Extrafield Project Layouts. What should I do to customize them?

May I know which layout are you referring to? https://ja-decor.demo.joomlart.com/

I got your point but not sure how you want to customize this layout.

The options in menu item are defined here: /templates/ja_decor/etc/extrafields/project.xml

And the override of article: /templates/ja_decor/html/com_content/article/default.php