To use an add-in in the current model, choose it from the Add-ins list () in the Developer ribbon toolbar. The add-in will then be added to the current model under Global Definitions. To add an add-in to the Add-ins list, select it in the Add-in Libraries window (see below). Once the add-in is available under Global Definitions, it works like any other node with a Settings window. Depending on its contents, it will affect the model by some functionality contained in the add-in.