Fold / Collapse the except code section in sublime text 2

Question

Is there any plugin or shortcut to hide all except code section in sublime text 2?

I need to fold all except section at a time , Not fold one section at a time.

Answer 1

If you'll hover with the mouse over the line numbers you'll see arrows - clicking on any of them will fold/collapse the code

If you want to collapse/expand all - you can do so by going to edit->code folding and choose "fold all" or "unfold all":