Port access and port trunk

i have two ethernet interfaces to which i have assigned two separate vlans (ethernet 2 for vlan 30 and ethernet 80 for vlan 20). how do i configure them as access ports?
i also have another ethernet interface 1. how do i create a trunk with vlan 20 and 30 on that interface?

http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1