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