The -e switch enables emacs-style keystrokes. The following characters are accepted: 'C' (Control), 'A' (Alt), 'Del', 'Up', 'Down', 'Left', 'Right', 'Esc', 'F1' to 'F12' and 'Enter'. They can be combined using the '-' character. For example "C-a" will input Control and a pressed together. "C-A-Del" will produce the famous Control-Alt-Del sequence.