http://5ekxbftvqg26oir5wle3p27ax3wksbxcecnm6oemju7bjra2pn26s3qd.onion/releases/stable/i386/ch05s02.vi.html
With the newt front-end (used mostly with braille), one mostly just selects answers with arrow keys and presses Enter to validate the choice. Pressing Tab or Shift - Tab allows to switch between dialog elements, and notably to access the Go Back button, which brings back again to previous questions.