Abstract: Apparatus for producing copies of portions of an original document and at least one selectively positioned supplemental document which masks the portion of the original document not reproduced. A copier with an image receiving station is provided. A holding device positions the original document into operative association with the image receiving station. The supplemental documents are placed in a transparent over-lay which is positioned between the holder and the image receiving station. The set-up is such that the supplemental documents are in a position to be reproduced while preventing the corresponding portions of the original document masked by the supplemental documents from being reproduced. A transfer device moves the holding device in a reciprocating motion to place the supplemental documents and the original document in first and second relative positions during first and second copy cycles, respectively.