X.Org is an open source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.
On HP Z1 AIO workstations using Intel embedded graphics, the Anaconda installer uses graphical install mode, but displays it only in one quarter of the screen. Although the installation completes successfully, navigation can be difficult in this mode. To work around this problem, use the text-based installation instead of graphical mode, which correctly uses the entire screen on the mentioned workstations.