I have menu like this 

Root 1

Root 2

Root 3

----SubPage 1

--------SubSubPage 1.1

--------SubSubPage 1.2

----SubPage 2

--------SubSubPage 21

--------SubSubPage 2.2

I want to show all the nodes below the root of the page i am on

So for example If i am on SubSubPage 2.1 my menu would be

• Subpage 1
• SubSubPage 1.1
• SubSubPage 1.2
• SubPage 2
• SubSubPage 2.1
• SubSubPage 1.2

I have tried a few different iterations of menu noes in the selector but cant seem to get it