How are you everyone,

I have a question about this, i'm currently using rockettheme ''tachyon'' template, i created a new menu item for the use of k2 as a news section,

What is the use of templating (sub-templating) on k2?

I created a menu, articles ar shown but i can't add modules (k2 content) to that k2 menu in other positions
Anyone know why?

Thank you.