How do I open two tabs in a split pane in iTerm? I have a split pane iTerm window 

I would like to have two tabs in the right "pane", (as opposed to total of three panes) but cannot figure out how to do this. 

I lucked into this yesterday, for the first time ever and loved it, but can't seem to remember how it was done. 

Anyone know the process for adding tabs to the right half pane?
Really late answer, but you are probably looking for Cmd+D or Cmd+Shift+D, if I understand it correctly.
(still might be useful for some lost soul out there)