For some reason, Blizzard decided to include beautiful maps for every area of Azeroth except instances. You can still see the area surrounding you in the minimap when you're in an instance, but never the overall layout of the entire dungeon. This is where Atlas comes in. The core of Atlas is basically an image viewer. However, it's the images that come with Atlas that make it worthwhile: a map for every instance in the game. Furthermore, the maps are marked with the locations of bosses and other points of interest. Atlas also includes maps of battlegrounds, dungeon locations, flight points, and outdoor raid bosses. After installing Atlas, you'll notice a new icon on the minimap that looks like part of a little globe (you can right-click the icon to drag it around the minimap's frame). Click this icon to open up the main Atlas window, which displays the maps and legend. You can alternatively use the slash-command /atlas. The drop-downs at the top of the window enable you to navigate between the maps. You can also drag the Atlas window around the screen. Lock it in place with the little lock button in the upper-right corner. At the bottom of the legend is a small text-entry field as well as Search and Reset buttons. Type part of a word or name in the box and click the Search button, and the legend's entries are reduced to only those that match your text. Note that the search is performed only on the entries for the current map, not all the entries in the database. While not so useful for instances with only a few entries like Ragefire Chasm, the search comes in handy when there are a ton of entries, like for Blackrock Depths or the AtlasMajorCities plug-in. If you want to get the whole list back, just click Reset.