Systems and methods for controlling shelf display units and for graphically presenting information on shelf display units are disclosed. A system includes one or more display units configured to be coupled to shelves of a modular shelving system, one or more processors communicatively coupled to the one or more display units, one or more memory components communicatively coupled to the one or more processors, and machine readable instructions stored in the one or more memory components. When executed by the one or more processors, the machine readable instructions cause the system to determine a product identifier corresponding to a product, identify one or more display units to update in response to determining the product identifier corresponding to the product, and update a graphical output of the one or more display units identified to be updated in response to identifying the one or more display units to update.