One of your users has installed a commercial publishing program that works under X on a variety of UNIX and Linux platforms. The user made a series of configuration changes regarding the initial windo

The ~/.Xdefaults (or ~/.Xresources) file is a common location for X applications to store user-specific resource settings, including preferences for window size, position, and colors. These settings typically override system-wide defaults and are loaded when an X application starts.

~/.xinitrc is a shell script executed by xinit or startx when starting an X session; it typically launches window managers and other initial X applications, but it does not store application-specific graphical settings.

~/.xconfig is not a standard or widely recognized file for storing X application configuration settings in Unix-like systems.

/etc/X11/XF86Config (or similar files like xorg.conf) is the system-wide configuration file for the X server itself, controlling hardware settings like monitor resolutions, keyboard layouts, and graphics card drivers, not individual application settings.