Code between backticks, please.
Keep in mind that modifying core theme files is NOT recommended.
You can create a copy of this file with your modifications and copy it over to your child theme folder, but:
1) The child theme file will be loaded, instead of the parent theme file
2) So when you update the parent theme, this page will not be updated. Also, if the theme structure changes (as Graphene did with the 1.6 release), this page may cease to work altogether.
Any plugin that requires you to modify core theme files is not as well designed as it should be.