Configuration example :
(config)#spanning-tree mode mst
(config)#spanning-tree mst configuration
(config-mst)#instance 1 vlan ( # )
(config-mst)#name ( name )
(config-mst)#revision ( # )
(config-mst)#exit
You can adjust the priority of the instance by using :
(config)#spanning-tree mst (#) priority ( # )
show spanning-tree mst configuration
show spanning-tree mst