Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Preview for New Nodes
PREF_NODE_EDITOR_PREVIEW
Parameter: Grid
PREF_NODE_EDITOR_GRID
Parameter: Navigator
PREF_NODE_EDITOR_NAVIGATOR
Parameter: Errors
PREF_NODE_EDITOR_ERRORS
Parameter: Wire Style
PREF_NODE_EDITOR_WIRE_STYLE