CAD
Official Project CAD Package
The official CAD software of ondroid is Ondsel (a FreeCAD derivative). Ondsel files are backwards compatible with FreeCAD, so in the case you'd prefer using FreeCAD, you're able to open files with it but without the assembly functionality.
Check if your CAD Package is Allowed
Assemblies
Assembly owners are responsible for managing part PRs and placement recommended by the engineers designing parts.
Part Placement
Parts can be drawn in any orientation. Their position is controlled at the assembly they reside in.