title: How to set up a code review using Gitlab?
body: <p>How does one set up a code review using Gitlab?  I see it listed as a feature on the Gitlab website, but I can't seem to find instructions on how to set one up (For that matter, any link to a Gitlab user manual would be most appreciated).  </p>
  
  <p>Some of my searching has indicated that 'Merge Requests' are the way to go... but I'm finding them limiting.  An issued merge request shows all of the commits between one branch and the other.  I seem to only be able to view diffs generated for each individual commit.  For example, let's say I have a file I want to review.  It is a new file but I've submitted changes to it over 10 commits on a dev branch.  If I issue a merge request for that dev branch from integration I see 10 commits each of which show the incremental changes made to the file... I want to review the entire thing.  It is new!  </p>
  
  <p>Am I barking up the wrong tree here?  Is there an actual code-review tool I can use in GitLab, or are merge requests the way to go, and if they are am I using them incorrectly?  what's the best way to set up a proper code review here?</p>