These materials can include pamphlets, booklets, films, videos and audio clips that are used in the media and at conferences and exhibitions etc.
Gall y deunyddiau hyn gynnwys pamffledi, llyfrynnau, ffilmiau, fideos a chlipiau sain sy’n cael eu defnyddio ar y cyfryngau ac mewn cynadleddau ac arddangosfeydd ac ati.