Close current sheet

I really am not a fan of everything being on the left, but in "trying" to get use to the new layout I have yet to find a way to close the current sheet. 

I don't want to click on a new sheet just for the current sheet to fall to recent  (too many already sit in there now), but I want it to close. 

Is there a way to close current sheet with out all the extra clicks of choosing another sheet to force the current to go to recent then close from there?