Vertex DS 2021 Documentation What's new in Vertex DS 2021 Functional improvements for everyday work Use product configurator with a modernized user interfaceConfigurator user interface is more illustrative and more easy to use than before. The Flow documentation contains more detailed instructions on how to use Flow / DesignStream (DS). DS is largely similar to Flow in its basic features, data structures, and interfaces. The Flow name may appear in DS in some contexts. and, for example, the utility program Flowlet is also named after Flow.