How do I intelligently re-indent Clojure in Emacs?

I'm new to Clojure and new to Emacs.

Is there an Emacs short-cut to intelligently re-indent the whole file? if not, is there at least a way to indent selected regions left or right?

I feel like I'm back in the stone age repeatedly pressing the arrows

Solution

C-x h selects the entire buffer. C-M-\ reindents the selected region.