fgpanel

fgpanel --panel=file [--fg-root=path] [--prop:name=value]

fgpanel is a free, open-source, multi-platform, and lightweight panel rendering engine to draw 2D panels on a low-cost computer/graphic card without 3D acceleration at reasonable frame rates.

--panel=file

Display the panel description file file.

--fg-root=path

Set the FlightGear data root directory ($FG_ROOT) to path.

--prop:name=value

Set the property named name to value.

fgfs(1), the FlightGear wiki "FGPanel" page