Thank you for your answers. Nonetheless, if I want to use Swiss pass from
Zermatt to Milan : I can buy ticket from Brig to Milano centrale at Zermatt station,right?
At Brig station : I need to walk from platform 14 to platform 6 within 7 minutes with luggage? Is that possible? How to walk? Quite confuse with the pdf map on website. Please kindly explain.
Milan to Lugano : I have to buy RE or EC ticket at Milano station to cover the cost to Chlasso and then showing swiss pass to cover from Chiasso to Lugano (but do not need to change the train). Am I correct? RE or EC train, can I buy from Eurorail or have to buy from SBB website? Also from
Lugano to Milan : I show swiss pass and then buy the route from Chlasso to Milan at Lugano station?
How can I observe which train is SBB,RE, or EC. I don't see platform number of RE or EC on SBB website. Then I need to go earlier to check the platform?