Yamaha O2R Owner's Manual page 137

Display Screens
There are two screens in the Ø/ATT display function. Shown below is the
first - MIC/LINE 1 through 16 and LINE 17/18 through 23/24:
Select this screen by pressing a [SEL] button for one of the MIC/LINE
channels.
Shown below is the second screen - TAPE 1 through 16, EFFl and EFF2,
and STEREO output (attenuation only):
Select this screen by pressing a [SEL] button for the tape or effect returns
channels or the master stereo output channel.
MIXING Display Functions
Digital Recording Console 02R User's Guide
33