In the Scenario Filters Tab you can add filters to remove certain content elements from the generated output.
You have two ways in which to define filters:
If you already have a DITAVAL file associated with the transformed map you can specify the path to it and it will be used when filtering content. You can find out more about constructing a DITAVAL file in the DITA OT Documentation.
You can configure a simple list of attribute (name, value) pairs which when present on an element in the input will remove it from output.