fold-out
adjective
ukusa fold-out page, map, etc. can be opened out from a book or magazine to make a bigger page:
The magazine contained a fold-out poster announcing the trade exhibition.
fold-out
noun [ C ]
ukusa page, map, etc. that can be opened out from a book or magazine to make a bigger page:
The fold-out in the centre of the catalogue contains a list of new products.