The default window manager operation is largely controlled by a system-wide configuration file, /usr/lib/X11/system.pmwmrc (or, if you opt to run the window manager in mwm mode, /usr/lib/X11/system.mwmrc). This file establishes the contents of the Root and Window menus, how menus and menu options are invoked, and what key and mouse button combinations can be used to manage windows.
Individual users can customize this behavior, using their personal window manager configuration file, $HOME/.pmwmrc or $HOME/.mwmrc.
Other window manager features that you can change, such as the appearance of window frames, icons, and menus, the keyboard focus policy, and how icons are arranged on the display, are controlled through resources.
This chapter discusses: