Wikipedia:Tip of the day/January 30
A page history shows the order in which changes were made to any editable Wikipedia page, the difference between any two versions, and a menu of special external tools. wikEdDiff merges all edit changes in to one wide diff view. The two column raw diff view will still be displayed below the wikEdDiff version.
Easiest install is at the Gadget tab in user Preferences. Check off: wikEdDiff, improved diff view between article versions (not needed if wikEd is used); save; . Can also be installed as a User Script.