drawFooter = () => {
    const commands = {
      'dd': 'Kill process',
      'j': 'Down',
      'k': 'Up',
      'g': 'Jump to top',
      'G': 'Jump to bottom',
      'c': 'Sort by CPU',
      'm': 'Sort by Mem'
    }
    let text = ''
    for (const c in commands) {
      const command = commands[c]
      text += `  {white-bg}{black-fg}${c}{/black-fg}{/white-bg} ${command}`
    }
    text += '{|}http://parall.ax/vtop'
    const footerRight = blessed.box({
      width: '100%',
      top: program.rows - 1,
      tags: true,
      fg: loadedTheme.footer.fg
    })
    footerRight.setContent(text)
    screen.append(footerRight)
  }
Draw the footer

@todo This appears to break on some viewports