Large models can require that individual signals be routed to many separate locations in a model reference or subsystem hierarchy. You can configure a data store to allow access to signal data from anywhere in a model, similar to a global variable in a computer program. However, as with global variables, data stores can reduce model transparency and make model verification more difficult. To decide whether to use a data store, see When to Use a Data Store. To see data stores in use in a model, see Data Store Examples.