When you apply attributes to all instances or partitions in a session, you must open the session and edit one of the session objects. You apply attributes or properties to other instances by choosing an attribute in that object and selecting to apply its value to the other instances or partitions.
To apply attributes to all instances or partitions:
Open a session in the workspace.
Click the Mappings tab.
Choose a source, target, or transformation instance from the Navigator. Settings for properties, connections, and readers or writers might display, depending on the object you choose.
Right-click a reader, writer, property, or connection value.
A list of options appears.
Select an option from the list and choose to apply it to all instances or all partitions.