xrandr

xrandr is a powerful command line tool used for managing display settings in the X Window System. It stands for X Resize, Rotate and Reflect. The tool allows users to configure and alter screen resolutions, refresh rates, and display orientations on the fly, using a variety of options and parameters.

With xrandr, users can easily add or remove monitors, adjust their position and relative positioning, enable or disable displays, and mirror or extend their desktops. It supports multiple output devices, such as monitors and projectors, and provides a flexible way to configure their display properties.

xrandr can also be used to change the screen size, adjust the screen's aspect ratio, and set the display mode to clone, extended, or single display. It can be particularly useful for multi-monitor setups, presentations, and situations where a quick display adjustment is required.

This command line tool not only provides a textual interface to configure display settings but also allows users to create scripts and set up custom display profiles. Overall, xrandr is a handy utility for efficiently managing and customizing display configurations in the X Window System.