Abstract: There is disclosed a wall rail system for removeably supporting modular units in an environment where it is especially useful to be both mobile and aesthetically pleasing. The wall rail retains a color-coordinated protective insert panel which may be replaced from time to time in accordance with decorative requirements. A slot key is provided for attachment to the back of each modular unit, which rests securely on the J-shaped lower extension of the wall rail, and each modular unit also bears a standoff on its back below the slot key and wall rail to maintain a level orientation. This system provides modular unit support which resists typical accidental shocks yet allows easy removal by hand.