To change the receipt size, first head to the Oliver HUB. Receipt sizes are specific to each Register (or Kiosk), so the first step is to specify which one that is.
Click on Settings and select Registreert. Once in the Registreert page, click the name of the register whose receipt settings you wish to access.
Under the Details tab, you should see an option called Receipt Size where the size of the receipt can be adjusted. Don’t forget to hit Submit to apply the changes!