Once you have created a Dataset you may need to modify its schema, either to add new Concept types to it, or to modify the properties of a Concept within.
To view a Dataset's schema, click the menu icon in the top right of its tile on the relevant project's homepage, and select Manage.
This will take you to the Dataset's Schema screen – a read-only view of the its Concepts and their property definitions:
Adding a new Concept class to a Dataset
To add a new Concept class/type to a Dataset schema, click on the Manage button at the top of the read only schema view. Then select one or more new Concept class to add (or remove) from the Dataset