Example documents:
    Keyboard Shortcuts
    Clipboard
    Ctl or ⌘ + C Copy selected text
    Ctl or ⌘ + X Cut selected text
    Ctl or ⌘ + V Paste text at the cursor
    History navigation
    Ctl or ⌘ + Z Undo
    Ctl or ⌘ + Y Redo
    Ctl or ⌘ + ⇧ + Z Redo
    Formatting
    Ctl or ⌘ + B Make selected text bold
    Ctl or ⌘ + I Make selected text italic
    Ctl or ⌘ + K Make selected text a link
    Selection
    ⇧ + Arrow Adjust selection
    Alt + Arrow Move cursor by words or blocks
    Alt + ⇧ + Arrow Adjust selection by words or blocks