The7 typography shortcodes are available in a standard WYSIWYG editor and, in result, in Visual Composer “Text Block”.
Before getting started, please make sure that you’re accustomed with idea of shortcodes in WordPress: http://en.support.wordpress.com/shortcodes/
Note that link above is given only for the quick illustration of what shortcodes are. Not all shortcodes described in it will work in your theme.
Apart from visual elements/shortcodes in Visual Composer in The7 we are also utilizing conventional text-based shortcodes which are listed in a dropdown when clicking on “Shortcodes” in your WYSIWYG (fig. 1).
All shortcodes (both Visual Composer and text-based), are listed under “Shortcodes” section at http://the7.io/. You can install the “Main” demo in The7 > Pre-made Websites interface in case you need example of shortcodes usage.