window manager

Layers of the graphical user interface:Under X, the window manager and the display server are two distinct programs; but under Wayland, the function of both is handled by the Wayland compositor. Typical elements of a window. The window decoration is either drawn by the window manager or by the client. The drawing of the content is the task of the client. Under X11, when no window manager is running, the window decorations are missing.

A window manager is system software that controls the placement and appearance of windows within a windowing system in a graphical user interface. Most window managers are designed to help provide a desktop environment. They work in conjunction with the underlying graphical system that provides required functionality—support for graphics hardware, pointing devices, and a keyboard—and are often written and created using a widget toolkit.