Use Tall and Wide for split screen layouts. This should be less confusing.

Config.hs

@@ -84,11 +84,8 @@ keys = M.fromList $
     , ((modMask,               xK_j     ), raise GT)
     , ((modMask,               xK_k     ), raise LT)
 
-    , ((modMask,               xK_h     ), changeHorz (negate defaultDelta))
-    , ((modMask,               xK_l     ), changeHorz defaultDelta)
-    -- Not implemented yet:
-    -- , ((modMask .|. shiftMask, xK_j     ), changeVert defaultDelta)
-    -- , ((modMask .|. shiftMask, xK_k     ), changeVert (negate defaultDelta))
+    , ((modMask,               xK_h     ), changeSplit (negate defaultDelta))
+    , ((modMask,               xK_l     ), changeSplit defaultDelta)
 
     , ((modMask .|. shiftMask, xK_c     ), kill)
 

Operations.hs

@@ -37,8 +37,8 @@ refresh = do
         mapM_ (\(w, Rectangle a b c e) -> io $ moveResizeWindow d w a b c e) $
             case layoutType fl of
                 Full -> fmap (flip (,) sc) $ maybeToList $ W.peekStack n ws
-                Horz -> tile (tileFraction fl) sc $ W.index n ws
-                Vert -> vtile (tileFraction fl) sc $ W.index n ws
+                Tall -> tile (tileFraction fl) sc $ W.index n ws
+                Wide -> vtile (tileFraction fl) sc $ W.index n ws
         whenJust (W.peekStack n ws) (io . raiseWindow d)
     whenJust (W.peek ws) setFocus
 
@@ -68,9 +68,9 @@ flipRect (Rectangle { rect_x = x, rect_y = y, rect_width = w, rect_height = h })
 switchLayout :: X ()
 switchLayout = layout $ \fl -> fl { layoutType = rot (layoutType fl) }
 
--- | changeHorz.  Changes the horizontal split.
-changeHorz :: Rational -> X ()
-changeHorz delta = layout $ \fl ->
+-- | changeSplit.  Changes the window split.
+changeSplit :: Rational -> X ()
+changeSplit delta = layout $ \fl ->
     fl { tileFraction = min 1 (max 0 (tileFraction fl + delta)) }
 
 -- | layout. Modify the current workspace's layout with a pure

XMonad.hs

@@ -51,7 +51,7 @@ data XState = XState
 type WorkSpace = StackSet Window
 
 -- | The different layout modes
-data Layout = Full | Horz | Vert deriving (Enum, Bounded)
+data Layout = Full | Tall | Wide deriving (Enum, Bounded)
 
 -- | 'rot' for Layout.
 rot :: Layout -> Layout