diff --git a/.config/nvim/lua/key/common.lua b/.config/nvim/lua/key/common.lua
index 6765903..7f3330b 100644
--- a/.config/nvim/lua/key/common.lua
+++ b/.config/nvim/lua/key/common.lua
@@ -2,7 +2,7 @@ require('key/rekey')
 
 rekey_normal('<Leader>.', '@:')           -- repeat command.
 rekey_visual('<Leader>.', '@:')           -- repeat command.
-rekey_normal('zz', '<cmd>wa<cr>')         -- save file.
+rekey_normal('zz', '<cmd>wa<cr>')         -- save all files.
 rekey_normal('<Leader>z', '<cmd>wqa<cr>') -- save & quit all.
 rekey_normal('<Leader>v', 'v')            -- visual select (duplicate).
 rekey_normal('gh', '0')                   -- go left.
diff --git a/.config/nvim/lua/key/window.lua b/.config/nvim/lua/key/window.lua
index 13fe088..241f884 100644
--- a/.config/nvim/lua/key/window.lua
+++ b/.config/nvim/lua/key/window.lua
@@ -1,5 +1,7 @@
 require('key/rekey')
 
-rekey_normal('_', '4<C-w><')
-rekey_normal('-', '2<C-w>-')
-rekey_normal('<Leader>=', '<C-w>=')
+rekey_normal('_',  '2<C-w>+') -- increase split size vertically.
+rekey_normal('-',  '2<C-w>-') -- decrease split size vertically.
+rekey_normal('|',  '4<C-w>>') -- increase split size horizontally.
+rekey_normal('\\', '4<C-w><') -- decrease split size horizontally.
+rekey_normal('<Leader>=', '<C-w>=') -- equalize split sizes.