DefaultKeyBinding.dict

/* ~/Library/KeyBindings/DefaultKeyBinding.dict

Below cheat sheet taken from: https://gist.github.com/trusktr/1e5e516df4e8032cbc3d

Here is a rough cheatsheet for syntax.
Key Modifiers
^ : Ctrl
$ : Shift
~ : Option (Alt)
@ : Command (Apple)
# : Numeric Keypad

Non-Printable Key Codes

Standard
Up Arrow:     \UF700        Backspace:    \U0008        F1:           \UF704
Down Arrow:   \UF701        Tab:          \U0009        F2:           \UF705
Left Arrow:   \UF702        Escape:       \U001B        F3:           \UF706
Right Arrow:  \UF703        Enter:        \U000A        ...
Insert:       \UF727        Page Up:      \UF72C
Delete:       \UF728        Page Down:    \UF72D
Home:         \UF729        Print Screen: \UF72E
End:          \UF72B        Scroll Lock:  \UF72F
Break:        \UF732        Pause:        \UF730
SysReq:       \UF731        Menu:         \UF735
Help:         \UF746

OS X
delete:       \U007F

*/

{
  // This section changes the Home and End key behaviour.
  "\UF729"  = moveToBeginningOfLine:; // Home
  "\UF72B"  = moveToEndOfLine:; // End
  "$\UF729" = moveToBeginningOfLineAndModifySelection:; // Shift+Home
  "$\UF72B" = moveToEndOfLineAndModifySelection:; // Shift+End
  "^\UF729" = moveToBeginningOfDocument:; // Ctrl+Home
  "^\UF72B" = moveToEndOfDocument:; // Ctrl+End
  "^$\UF729" = moveToBeginningOfDocumentAndModifySelection:; // Ctrl+Shift+Home
  "^$\UF72B" = moveToEndOfDocumentAndModifySelection:; // Ctrl+Shift+End

  
  // This section swaps the Cmd+Arrow key behaviour with Alt+Arrow.
  "@\UF702" = moveWordBackward:; // Cmd+LeftArrow
  "@\UF703" = moveWordForward:; // Cmd+RightArrow
  // Lucas 2020-05-21 Disable the alt arrows for the time-being
  // "~\UF702" = moveToBeginningOfLine:; // Opt+LeftArrow
  // "~\UF703" = moveToEndOfLine:; // Opt+RightArrow
  "@$\UF702" = moveWordBackwardAndModifySelection:; // Cmd+Shift+LeftArrow
  "@$\UF703" = moveWordForwardAndModifySelection:; // Cmd+Shift+RightArrow
  // "~$\UF702" = moveToBeginningOfLineAndModifySelection:; // Opt+Shift+LeftArrow
  // "~$\UF703" = moveToEndOfLineAndModifySelection:; // Opt+Shift+RightArrow
  
  // Delete a word backwards
  "@\U007f" = deleteWordBackward:; //Cmd+backspace
  // Delete a word forwards
  "@\UF728" = deleteWordForward:; //Cmd+delete
}