Philips VTR8400 User Manual page 28

DMR volume adjustment
When the DMR is on, rotate the DMR switch to adjust
the volume; press the "volume + / volume - " to adjust
the volume of the system.
Channel selection
When DMR is on, rotate the channel selection button
to select the corresponding channel; you can also click
the group name in the DMR main interface to enter the
channel selection interface.
28 EN