Linking Zones
You can link zones 1 and 2 to keep the volume levels synchronized. Adjusting the volume of either of the linked zones affects both zones.
Select
Fusion Media > 
> ZONE > ZONE 2 > LINK TO ZONE 1.
> ZONE > ZONE 2 > LINK TO ZONE 1.
When zones 1 and 2 are linked, 
appears on zones 1 and 2 on the volume screen.
NOTE:
After zones 1 and 2 are linked, you cannot adjust the volume of each zone individually.