What brew strength or size button should I use?

For best results please consult the product packaging for the suggested brew strength. You will find this printed in Gold.

Espresso intensity up to 8: we recommend brewing as Espresso (1.3oz/40ml)
 

Espresso intensity 9 and higher: we recommend brewing a smaller Ristretto size (0.8oz/25ml) or Espresso size (1.3oz/40ml) according to your personal tastes.

We recommend a larger Lungo size (3.7oz/110ml) for all intensities.