Install xorg-docs by entering the following commands in the terminal:
sudo apt update sudo apt install xorg-docs
Description:
Miscellaneous documentation for the X.org X Window System
This package contains various documents on the X.org X Window System including the release notes for the current version and instructions on the font and xkb subsystems. The documents are in html, pdf, ps, and plain text format.
Version: 1:1.7.1-1.1
Section: x11