Display apparatus comprises a support frame having elongate frame members (1) pivotally interconnected at nodes (2) and at their crossing mid points so that the apparatus is capable of being transformed between a compact condition for storage or transport and an erected condition in which display panels (3) can be attached to the frame. The nodes (2) are arranged in vertically spaced groups and the uppermost node (2) of each group carries a reel (9) in which is wound a metal tape (8) withdrawable from the reel (9) to support the display panels (3) on the frame by magnetic attraction.