/lcd
set backlight-timeout=never default-screen=stats touch-screen=disabled
/lcd interface
# turn off the interfaces you don't want to graph
set ether2 disabled=yes
# ...
set sfp1 disabled=yes
# ...
/lcd screen
# turn off everything but the bandwidth graph
set 1 disabled=yes
set 2 disabled=yes
set 3 disabled=yes
set 4 disabled=yes
set 5 disabled=yes