The Xic user may have access to only a subset of features. These feature sets correspond to "virtual" products, that were historically separate programs.
There are three feature sets available. The ``FULL'' set enables all Xic features. The ``EDITOR'' feature set corresponds to the XicII program, which provides physical layout editing capability. The ``VIEWER'' feature set corresponds to the Xiv program, which allows physical layout viewing. The subsections that follow describe these feature sets in more detail.