Common Image Area for Paper Sizes P4 and A4
Defines the size and location of the image area common to both
Canadian P4 and ISO A4 sizes of paper. This common image area is
intended to facilitate the design and exchange of documents. It
permits the alignment of trade documents or of other documents,
and allows the material contained within the image area to be
reproduced from either size of paper onto the other without loss
of essential information.