Abstract: Apparatus (10) for aiding the layout and editing of items of sheet material, comprising a portable case (12) composed of a plurality of panel units (14,15,16) hingedly coupled to one another such as to form, when folded together, a closed container. The closed case (12) contains a plurality of tabular elements (24,25,26), at least one of which is co-operable with a panel unit (14,15) such as to be erectable into an easel-like state when the case (12) is open with a panel unit (14,15) providing support for the tabular element (24,25) in an inclined position. This or another one of the tabular elements (25) may be provided with a repeatably adherent adhesive substance (54) of low adhesion to permit peeling off therefrom of items of sheet material temporarily mounted thereon. Another one of the tabular elements (26) supports, when the case is open, a cutting device (62) for trimming the items of sheet material to desired sizes.