diff --git a/nix/home-manager/profiles/qtile-desktop.nix b/nix/home-manager/profiles/qtile-desktop.nix
index f89caae..1810b11 100644
--- a/nix/home-manager/profiles/qtile-desktop.nix
+++ b/nix/home-manager/profiles/qtile-desktop.nix
@@ -153,16 +153,21 @@ keys = [
     Key([key_super, key_control], "l", lazy.layout.client_to_next().when(layout='stack')),
 
     # Columns
-    Key([key_super], "h", lazy.layout.left().when(layout='columns')),
-    Key([key_super], "l", lazy.layout.right().when(layout='columns')),
-    Key([key_super], "j", lazy.layout.down().when(layout='columns')),
-    Key([key_super], "k", lazy.layout.up().when(layout='columns')),
-    Key([key_super, key_control], "j", lazy.layout.shuffle_down().when(layout='columns')),
-    Key([key_super, key_control], "k", lazy.layout.shuffle_up().when(layout='columns')),
-    Key([key_super, key_control], "h", lazy.layout.shuffle_left().when(layout='columns')),
-    Key([key_super, key_control], "l", lazy.layout.shuffle_right().when(layout='columns')),
+    Key([key_super], "h", lazy.layout.left().when(layout="columns")),
+    Key([key_super], "l", lazy.layout.right().when(layout="columns")),
+    Key([key_super], "j", lazy.layout.next().when(layout="columns")),
+    Key([key_super], "k", lazy.layout.previous().when(layout="columns")),
+    Key([key_super, key_control], "j", lazy.layout.shuffle_down().when(layout="columns")),
+    Key([key_super, key_control], "k", lazy.layout.shuffle_up().when(layout="columns")),
+    Key([key_super, key_control], "h", lazy.layout.shuffle_left().when(layout="columns")),
+    Key([key_super, key_control], "l", lazy.layout.shuffle_right().when(layout="columns")),
+    Key([key_super, key_control], "space", lazy.layout.toggle_split().when(layout="columns")),
 
     # Max
+    Key([key_super], "j", lazy.layout.down().when(layout="max")),
+    Key([key_super], "k", lazy.layout.up().when(layout="max")),
+
+    # TODO: these are required to make the 'columns' layout work, but why?
     Key([key_super], "j", lazy.layout.next()),
     Key([key_super], "k", lazy.layout.previous()),