// Specify CEF global settings. CefSettings settings; settings.multi_threaded_message_loop = true;
This property is present in CefSettings.
https://bitbucket.org/xilium/xilium.cefglue/src/4929a2c3d1a561f66fafcc758b45ff4cc0b7e9db/CefGlue/Structs/CefSettings.cs?at=default#cl-204