Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Language
PREF_INTERFACE_LANGUAGE
Parameter: Scheme
PREF_INTERFACE_SCHEME
Parameter: Highlight Features
PREF_INTERFACE_NEWFEATUREHIGHLIGHT
Parameter: Fading
PREF_INTERFACE_NEWFEATUREHIGHLIGHT_FADE
Parameter: Reset Highlights
PREF_INTERFACE_NEWFEATUREHIGHLIGHT_RESET
Parameter: GUI Font
PREF_INTERFACE_FONTSTD
Parameter: Monospaced Font
PREF_INTERFACE_FONTMONO
Parameter: Big Font
PREF_INTERFACE_FONTBIG
Parameter: Show Mac Menu Bar
PREF_INTERFACE_MACMENU
Parameter: Icons in Menu
PREF_INTERFACE_MENUICONS
Parameter: Shortcuts in Menu
PREF_INTERFACE_MENUSCUT
Parameter: Show Undo Buttons
PREF_INTERFACE_SHOWUNDOBUTTONS
Parameter: Bubble Help
PREF_INTERFACE_BUBBLE
Parameter: Online Content
PREF_INTERFACE_ONLINEHELP
Parameter: External Browser
PREF_INTERFACE_EXTERNALHELP
Parameter: Field Remapping Graph
PREF_INTERFACE_HIDEFIELDGRAPH
Parameter: Simple UI for Fields
PREF_INTERFACE_SIMPLEFIELDUI
Parameter: Create Objects at View Center
PREF_INTERFACE_CENTEROBJECT
Parameter: Insert Objects at
PREF_INTERFACE_INSERTAT
Parameter: Paste Objects at
PREF_INTERFACE_PASTEAT
Parameter: AM Selection Limit
PREF_INTERFACE_AMLIMIT
Parameter: AM Selection Limit (Nodes)
PREF_INTERFACE_AMLIMIT_NODES
Parameter: Script Word Wrap
PREF_INTERFACE_SCRIPTWORDWRAP