I purchased a WordPress template also it adds newer and more effective "groups" within the WordPress Dashboard. (For example "Works", "Trends", "Styles", "Styles" within the screenshot) However, I must perform some modification for them, is the fact that possible? It is possible to method to manage this "groups"? Or which keyword I possibly could use to find more details?

Sincerely

WordPress Dashboard

Individuals are Custom Publish Types - see http://codex.wordpress.org/Post_Types for more information. They are defined inside your theme's functions.php file, where one can edit their qualities.

Read this wordpress plugin if you prefer a visual interface raher than playing with code: http://wordpress.org/extend/plugins/custom-post-type-ui/