As the title implies, this panel controls the pneumatic systems of the plane. It allows the pilot to connect or disconnect the A/C packs and to use bleed air from the APU for main engines start.
In the B737, this subpanel is part of the big overhead panel. I had to separate it from the rest of the overhead stuff because of space limitations. I found a place for this panel on the right side of the cockpit, near the Com radios. I figgure that’s fine, since the only time I need to pay close attention to the switches and annunciators of this panel is during engine start.