My Sublime key map defination

Default.sublime-keymap

[
    // Delete a line
    { "keys": ["ctrl+alt+shift+d"], "command":"run_macro_file", "args": {"file":"Packages/Default/Delete Line.sublime-macro"} },
    // ctrl+gb find all
    { "keys": ["ctrl+g", "ctrl+b"],"command": "find_all_under" },
    { "keys": ["alt+up"], "command":"swap_line_up" },
    { "keys": ["alt+down"], "command":"swap_line_down" },
    { "keys": ["alt+/","alt+/"], "command":"insert_best_completion" },
    // For markdown preview package. Preview .md in browser.
    { "keys": ["alt+m"], "command": "markdown_preview", "args":{"target": "browser", "parser": "markdown"}},
    // Overwrite enter to start a new line, rather than insert a `\n`
    { "keys": ["enter"], "command": "run_macro_file", "args": {"file": "res://Packages/Default/Add Line.sublime-macro"} },
    // Overwrite ctrl+enter to substitute `enter` (insert a new line is more usual)
    { "keys": ["ctrl+enter"], "command": "insert", "args": {"characters": "\n"} },
    // Enter key has some other usage. This persist its usage
    { "keys": ["enter"], "command": "find_next", "context":
        [{"key": "panel", "operand": "find"}, {"key": "panel_has_focus"}]
    },
    { "keys": ["shift+enter"], "command": "find_prev", "context":
        [{"key": "panel", "operand": "find"}, {"key": "panel_has_focus"}]
    },
    { "keys": ["alt+enter"], "command": "find_all", "args": {"close_panel": true},
         "context": [{"key": "panel", "operand": "find"}, {"key": "panel_has_focus"}]
    },
]