Sony STR-ZA810ES Manual page 179

You can set variable or fixed volume control for the AUDIO ZONE 2 OUT jacks.
Select [Setup] - [Zone Settings] from the home menu.
1
Select [Zone2 Line Out].
2
Select the setting you want.
3
Variable:
Recommended when using another amplifier that does not have volume control for
Zone 2.
The volume for the AUDIO ZONE 2 OUT jacks can be changed.
Fixed:
Recommended when using another amplifier with variable volume control for Zone 2.
The volume for the AUDIO ZONE 2 OUT jacks is fixed.
Note
When [Variable] is set, the volume is turned down by default. Turn up the volume while listening to
the sound after completing setup. The volume for the SPEAKERS ZONE 2 terminals is changed
together with the volume for the AUDIO ZONE 2 OUT jacks.
[211] Adjusting Settings
Selecting the language (Language)
You can select the language of messages on the screen.
Select [Setup] - [System Settings] from the home menu.
1
Select [Language].
2
Select the language you want.
3
Note
When the Control for HDMI function on both the receiver and the TV (BRAVIA TV) is turned on, the
on-screen display language of the receiver is changed simultaneously when changing the language
for the on-screen display of the TV.
[212] Adjusting Settings
Tuning on/off the display for the volume level or sound
System Settings
System Settings