 to the bounds of the VisContent itself. The content's bounds are stored in the <CODE>
VI_bounds</CODE>
 field inherited from <CODE>
VisClass</CODE>
. When a content is managing layers or large documents, however, its bounds are set to zero. It then manages its document bounds within the layer objects and the GenView. When the document bounds change, a <CODE>
MSG_VIS_CONTENT_SET_DOC_BOUNDS</CODE>
 should be sent to the content to get it to notify all its layer children and the GenView of the new bounds. Thi