The application allows you to define document types, also called templates and reusable libraries of custom metada called attribute sets. Each template has a name, a description and one or more attributes. when you upload or edit a document, you can assign a template and specify the values for it's attributes.
To add a new template, you must click the Add template button and is sufficient to specify a unique name. Moreover, you can also select an existing template to view all associated attributes.
In the Properties pane it is possible to add more attributes by clicking Add attributes, then select the attributes you want to add between one or more defined set of attributes.
Click the Attribute set tab to manage the set of attributes. You can imagine the attribute set as a library containing definitions of reusable attributes. The attributes defined here can then be used in different templates.