Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Preview for New Nodes
PREF_NODE_EDITOR_PREVIEWParameter: Grid
PREF_NODE_EDITOR_GRIDParameter: Navigator
PREF_NODE_EDITOR_NAVIGATORParameter: Errors
PREF_NODE_EDITOR_ERRORSParameter: Wire Style
PREF_NODE_EDITOR_WIRE_STYLE