The &xcenter; is intended to be an add-on or replacement to the &warpcenter;, as introduced by &warp4;. That is, you can use it together with the &warpcenter;, or you can use it all alone.
Compared to the &warpcenter;, the &xcenter; has a number of advantages. For one, you can have more than one &xcenter; on your system; secondly, you can define what is displayed in the &xcenter; in a much more detailed way.
You can fine-tune some of the &xcenter; behavior, such as its display style, in its properties notebook.
The &xcenter; uses so-called widgets to display and/or access data. The &xcenter; contains the following standard widgets by default: