Abstract: A magnifying insert designed particularly for a binder having separable binding members for securing pages of printed material therein includes a substantially rectangular panel having a pair of side edges, a top edge and a bottom edge. The panel is a Fresnel lens for magnifying small or unreadable indicia on the pages secured within the binder. Along an edge of the panel are a plurality of apertures, each spaced, dimensioned and positioned to receive a select binding member. The panel can be interchangeably used as a conventional insert, a divider, a page mark or as a magnifying lens for enlarging fine print appearing on the bound pages. The panel can also include measurement indicia along an edge thereof allowing the device to also function as a measuring tool.