Simple key bindings for multiple panes in Sublime Text 2

sublime-key-bindings.sublime-keymap

[

  //** CUSTOM SET_LAYOUT BINDINGS **//
  
  {
    "keys": ["super+alt+left"],
    "command": "set_layout",
    "args":
    {
      "cols": [0.0, 0.33, 1.0],
      "rows": [0.0, 1.0],
      "cells": [[0, 0, 1, 1], [1, 0, 2, 1]]
    }
  },

  {
    "keys": ["super+alt+right"],
    "command": "set_layout",
    "args":
    {
      "cols": [0.0, 0.66, 1.0],
      "rows": [0.0, 1.0],
      "cells": [[0, 0, 1, 1], [1, 0, 2, 1]]
    }
  },

  {
    "keys": ["super+alt+up"],
    "command": "set_layout",
    "args":
    {
      "cols": [0.0, 0.5, 1.0],
      "rows": [0.0, 1.0],
      "cells": [[0, 0, 1, 1], [1, 0, 2, 1]]
    }
  },

  {
    "keys": ["super+alt+down"],
    "command": "set_layout",
    "args":
    {
      "cols": [0.0, 1.0],
      "rows": [0.0, 1.0],
      "cells": [[0, 0, 1, 1]]
    }
  },

  //** CUSTOM MOVE_TO_GROUP BINDINGS **//

  { "keys": ["alt+1"], "command": "move_to_group", "args": { "group": 0 } },
  { "keys": ["alt+2"], "command": "move_to_group", "args": { "group": 1 } },
  { "keys": ["alt+3"], "command": "move_to_group", "args": { "group": 2 } },
  { "keys": ["alt+4"], "command": "move_to_group", "args": { "group": 3 } }
]

Note: add these bindings to Preferences > Key Bindings - User.