This site is being deprecated.
Please see the official X‑Plane Support page for help.
You can’t change those things. That is the level of details which Laminar has intended to implement. But if it’s the Boeing 737-800 that you’re interested in flying, why not give the excellent Zibo Mod a try? It is superior in every way than the default B738 from which it was based: system details, flight model, avionics, FMC, immersion, continuous improvement and so on; except for the lower framerate. And it is free.
Installation information is here:
Look for and download the file with the name “…rc3.0_FULL_...” first (2GB zip).
When the new plane works out, you can download the one latest patch to update it.
This site is no longer being actively maintained.