we added Visual Composer plugin. To activate plugin after theme installation, please go to Appearance > Install Plugins section, install it and activate. After that plugin will be ready to use. Plugin after activation is available in the content section where default wordpress editor visible is. So please create/edit page and above wordpress editor you will see two large, blue buttons called Backend Editor and Frontend Editor. This is exactly what you need to build content within Visual Composer To explore the capabilities of Visual Composer, please have a look into documentation