Xfwm4

Xfwm4 is the window manager for the Xfce desktop environment for the X Window System. It handles window decorations, movement, resizing, focus handling, and basic window management. It is designed to be lightweight and fast, making it suitable for older hardware while providing a cohesive and visually consistent user experience with the rest of Xfce.

As the default window manager in Xfce, Xfwm4 supports features such as multiple workspaces, configurable focus models (focus follows mouse or click-to-focus), keyboard shortcuts for moving and resizing windows, and theming for borders and title bars. It integrates with the Xfce settings ecosystem, allowing users to customize behavior and appearance via the Settings Manager. It can be used with a separate compositing manager to provide shadows and transparency effects if available.

Xfwm4 is an open-source project released under the GNU General Public License and is maintained by the Xfce development team. It is designed to work closely with other components of the Xfce desktop, such as the panel, launcher, and session management, to deliver a consistent user experience. Configuration is stored per-user and can be adjusted through graphical tools or by editing configuration files.