Poets Space Forum Submitting work to groups?

Hello, I am brand new to this site and a little confused! (nothing strange about that...) I am desperately trying to figure out how to go about posting writes to groups? Perhaps I am simply having a blonde moment, but I see no options for submitting posted works to groups...does that mean works are automatically submitted to the groups I belong to, or how do I make it happen?   Your advice would be greatly appreciated...thanks!!

First, you can see the writing bar in our group site, right?
Click more, and you can see the bar which let you select what writing you can add