There is a range of handy shortcodes in the theme, which you can use for simple stuff like placing an icon, and complex things like placing a blog. Simple shortcode assistant allows you to play with them with just mouse clicking. If you prefer more complex solutions, the Visual Composer plugin is fully supported.
Each shortcode comes with parameters, so you can specify options of it. For example the Message box shorcode has a few simple options:
And this is the result:
You can see more examples of shortcodes in action on the Typography & Styles page. Using them is quite intuitive, but if you like reading documentations, full shortcodes list with all parameters is available in the theme documentation.