The Limit to par function is located on the Settings page > Limits
The limit to par function in VMS describes the normal amount of inventory you want to keep in a machine at a given time. A restock of a machine is based on a refill to par, replacing all the products sold since the last restock.
Picks are filled to Par for Vending and to Capacity for Micromarkets
Limit to Par and Limit to Capacity selection in Settings does NOT affect forecasting, they are used for UI in Field.