Yamaha O2R Owner's Manual page 217

Internal Effects 107
AUX Pages
The channel aux send level controls for each aux send are displayed on two
pages. The first page, shown below, shows aux controls for MIC/LINE
channels 1 to 24. Select this page using a MIC/LINE [SEL] button.
The second page shows aux controls for TAPE channels 1 to 16 and a single
effects return. To prevent a feedback loop, AUX 7 cannot be sent to Effect 1,
and AUX 8 cannot be sent to Effect 2. Select this page using a TAPE or EFF
RTN [SEL] button.
02R User's Guide