See the content parameter in the docs:
content: If you want to show the content on your listed posts, you might want to do this from a new Page Template or a Custom Post Type template. Using this parameter is discouraged, you can have memory issues as well as infinite loop situations when you’re displaying a post that’s using List Category Posts. You have been warned. Usage:
- yes – Show the excerpt or full content of the post. If there’s a <!–more–> tag in the post, then it will behave just as WordPress does: only show the content previous to the more tag. Default is ‘no’. Ex: [catlist content=yes]
- full – Show the full content of the post regardless of whether there is a <!–more–> tag in the post. Ex: [catlist content=full]
You can set a css class and an html tag to wrap the content in with content_class and content_tag (see HTML & CSS Customization).