FYI: I found it
1) Function display
Shows the function names.
1 Touch the source icon and then touch
“SOURCE OFF” to turn source off.
When the source icon is not displayed, you
can display it by touching the screen.
2 Touch “A.MENU” and then touch
“INITIAL” to display the function names.
The function names are displayed and operable
ones are selected.
When “A.MENU” is not displayed, you can
display it by touching the screen.
To return to the previous display, touch
“BACK”.
To return to the display of each source, touch