diff --git a/modules/home.nix b/modules/home.nix
index a440f4e..0c94223 100644
--- a/modules/home.nix
+++ b/modules/home.nix
@@ -136,6 +136,8 @@ in
     libreoffice
     grim        # screenshot capture (also used by the Print-key binds)
     slurp       # interactive region selector for grim
+    brightnessctl  # backlight control for the XF86MonBrightness binds; writes
+                   # via the active logind session, so no udev rule needed
   ];
 
   # Canonical XDG user dirs. Only Pictures is actually used (screenshot target,
@@ -533,8 +535,9 @@ in
         "$mod,		Return,	exec,		foot"
         "$mod,		q,	killactive"
         "$mod SHIFT,	q,	exit"
-        "$mod,		f,	fullscreen,	1"
-        "$mod SHIFT,	f,	fullscreen,	0"
+        # fullscreen arg: 0 = true fullscreen, 1 = maximize (keeps bar/gaps).
+        "$mod,		f,	fullscreen,	0"
+        "$mod SHIFT,	f,	fullscreen,	1"
         "$mod,		w,	exec,		${browser}"
         "$mod,		d,	exec,		fuzzel"
         "$mod,		Backspace,	exec,		${powerMenu}"
@@ -542,8 +545,11 @@ in
         "$mod SHIFT,	j,	layoutmsg,	swapnext"
         "$mod,		k,	layoutmsg,	cycleprev"
         "$mod SHIFT,	k,	layoutmsg,	swapprev"
-        "$mod,		h,	layoutmsg,	splitratio -0.05"
-        "$mod,		l,	layoutmsg,	splitratio +0.05"
+        # swap focused window with the master (dwm-style "zoom").
+        "$mod,		space,	layoutmsg,	swapwithmaster"
+        # master area width. Master layout uses `mfact`, not dwindle's `splitratio`.
+        "$mod,		h,	layoutmsg,	mfact -0.05"
+        "$mod,		l,	layoutmsg,	mfact +0.05"
       ] ++ (
         # Dynamic definitions for viewing workspaces 1 to 9 and moving windows between them.
         # References physical key codes for robustness with the SHIFT key, e.g. `code:10` instead of `1`.