A beverage dispensing system is disclosed, typical of prior art beverage dispensing systems, in that it is designed to dispense fluids, such as syrup and/or soda and water, from a bar gun. The bar gun is connected by a multiplicity of lines to a manifold and flow control assembly. The manifold and flow control assembly, in turn, receives a number of different fluids, typically syrup, water and soda, under pressure from a number of different pressurized containers. Applicants' novel system includes schematics, typically in the form of adhesive labels, applied to the dispensing system, typically on the manifold and flow control assembly, which schematics illustrate the button arrangement on the handle, and the inlet port layout on the handle, and relate the same, using words, symbols or a combination, to indicia identified ports on the manifold and flow control assembly.