{MENU: path=news/news_grid&limit=5&category=2&source=latest&featured=1&layout=news-grid-1}You can select the category what you want.
{MENU: path=news/news_grid&limit=5&category=2&source=latest&featured=1&layout=news-grid-1}The shortcodes in the Theme_shortcodes.php (category=2) and in the theme.php file you see the shortcodes and what shortcode in the layout.
<!-- News Grid Menu for Center Column 1. category -->