To create an Instance for either build or deploy click the 
button. To edit an Instance, click on an existing Instance row from the list.
Enter values for the following fields.
...
Click and drag plugin operations from the list in the right pane to the main pane to associate them to this Instance. To disassociate plugin operations from the Instance, drag the plugin operation back to the list on the right. Associated plugins give properties to the instance which are then configured on the Topology Overview page.
Click the Save button to save the changes to the Instance and return to the list of Instances. Optionally click the Apply button to save the changes, but remain on the current screen until the Cancel button is clicked.