Drafting conventions dictate that Project North is the top of the view. If you need to change Project North, use the Rotate Project North tool. This tool changes Project North for all views in the project. It also preserves the relative position of links. After rotating the project, verify the results in all views.
A message displays to indicate that the project was rotated. It also shows errors, if any. You can export errors to review and correct them. See http://beehive.autodesk.com/community/service/rest/cloudhelp/resource/cloudhelpchannel/guidcrossbook/jsonp?v=B3&p=VASARI&l=ENU&guid=GUID-4C146013-B50C-484C-B547-DAC36CDCD392.