Cron job setup instructions appears in Sendy where appropriate:
When you are at the ‘Define recipients’ page and you will see the cron job setup instructions note in a yellow box at the bottom (screenshot → http://go.sendy.co/sfO6HC)
Inside any lists, click on the 'Autoresponders' button at the top right and you'll be shown the cron job setup instructions (screenshot → http://go.sendy.co/ASYhGx)
When you're at the import CSV page, you'll see the cron job setup instructions in a yellow box (screenshot → http://go.sendy.co/F7iGZq)
Inside any segments, you'll see the cron job setup instructions in a yellow box at the bottom (screenshot → http://go.sendy.co/IAE1aa)