Arrows help please

Hello can anyone explain how arrows work?

I have been reading around and have come up with two completely different scenarios:
a) Red arrows affect team only when attacking, blue only when defending... so that your team reshapes according to the arrows.
eg on 442:
-A-A-
-----
LC-CR
-----
LD-DR
--G--

When attacking translates in:
-A-A-
L---R
-C-C-
-----
LD-DR
--G--

And when defending becomes
-A-A-
-----
L---R
-C-C-
LD-DR
--G--
b) arrows just affect the formation in other ways, having people attack more so unbalancing their role regardless of defending or attacking.
EG still on 442 above:
-A-A-
L---R
-----
-C-C-
LD-DR
--G--

so my question: what is the effect of arrows if you know?
Thanks in advance

The only thing we have as a fact for the arrows is this:

<<Q:Can we have wing positions, would be ahead of AMR and AML to each side of the strikers?

A:There are multiple ways to define roles in football, and the current one is the one we chose. AMR and AML with arrows set to forward would be the wing positions you are asking for.>>

With this as the basis, we have to guess the rest...