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+;;; display.el --- Working with single or multiple displays -*- lexical-binding: t -*-
+;; Author: William Carroll <wpcarro@gmail.com>
+
+;;; Commentary:
+;; Mostly wrappers around xrandr.
+;;
+;; TODO: Look into autorandr to see if it could be useful.
+;;
+;; Troubleshooting:
+;; The following commands help me when I (infrequently) interact with xrandr.
+;; - xrandr --listmonitors
+;; - xrandr --query
+
+;;; Code:
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Constants
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; TODO: Consider if this logic should be conditioned by `device/work-laptop?'.
+(defconst display/primary "eDP-1"
+  "The xrandr identifier for my primary screen (on work laptop).")
+
+(defconst display/4k "HDMI-1"
+  "The xrandr identifer for my 4K monitor.")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Library
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defun display/enable-4k ()
+  "Attempt to connect to my 4K monitor."
+  (interactive)
+  (shell-command
+   (string/format "xrandr --output %s --dpi 144 --auto --right-of %s"
+                  display/4k
+                  display/primary)))
+
+(defun display/disable-4k ()
+  "Disconnect from the 4K monitor."
+  (interactive)
+  (shell-command
+   (string/format "xrandr --output %s --off"
+                  display/4k)))
+
+(provide 'display)
+;;; display.el ends here