If you're talking about being able to pan channels assigned to linked busses, you need to also make sure buss link/buss pan is set up. Page 52 of the user manual describes how to do this.
"Pan switch There is an invisible “pan switch”
which links and unlinks pairs of busses (this also
depends on the linked pan mode).
When this switch is set, and busses are linked, they
are also joined for panning and they are assigned in
pairs.
However, when this switch is not set, the buss pairs
can be split for individual assignment.
• Pressing and holding the SHIFT key while
pressing one of the ASSIGN keys operates a
split or join function on a buss pair, allowing
busses to be individually assigned when split.
In Figure 4.7, Buss assignments with the pan switch
off, channel module 3 is selected, and assigned only
to buss 3, which has been separated from buss 4.
The linked pan mode (“BUSS Link/BUSS PAN are
Linked” on page 35) also determines whether splitting a buss pair either splits the busses for channels individually (as in the example screen above), or all together for all channels. When this parameter is set off, buss pairs may be split individually, and when it is on, buss pairs are split together.
Note that buss assignment is also connected to module linking. In this illustration, channels 1 and 2 are linked, but are assigned to busses 1 and 2. In this
case, the assignments are linked, so assigning channel 1 to buss 1 also links channel 2 to buss 1."
It's a bit convoluted, but makes more sense when you're viewing the screen.
Let us know if you need more info, or perhaps someone else can explain this more clearly.
